Struzak R:  Use of Topographic Data Bank, (Invited); Proceedings of the ITU IFRB Seminar on Frequency Management and the Use of Radio Frequency Spectrum and the Geostationary Orbit, Geneva, October 8-12, 1990 (In English, French and Spanish)

Struzak R:  Computer-Aided Spectrum Management, (Invited); Proceedings of the 9th International Zurich Symposium & Technical Exhibition on Electromagnetic Compatibility, Zurich, March 12-14, 1991, p. 193-198

Struzak R:  CCIR Preparations for WARC92, (Invited), Proceedings of the ITU IFRB/ BDT Regional Seminar on Frequency Management and the Use of Radio Frequency Spectrum and the Geostationary Orbit, Athens, Greece, September, 9-13, 1991

Struzak R:  Use of Topographic Data Bank, (Invited); Proceedings of the ITU IFRB/ BDT Regional Seminar on Frequency Management and the Use of Radio Frequency Spectrum and the Geostationary Orbit, Athens, Greece, September, 9-13, 1991 Note: This is an up-dated version of the paper presented at the ITU IFRB Seminar on Frequency Management and the Use of Radio Frequency Spectrum and the Geostationary Orbit, Geneva, October 8-12, 1990.

Struzak R:  Travaux Preparatoires du CCIR pour la CAMR92, (Invited), Cycle d’Etudes Regional ITU IFRB/ BDT sur la Gestion des Frequences et l’Utilisation des Frequences Radioelectriques et de l’Orbite des Satellites Geostationnaires, Praia, Cap Vert, 28 octobre -1er novembre, 1991, Doc. No. 18; (In French)  Note: This is an up-dated French version of the paper presented at the IFRB/ BDT Regional Seminar on Frequency Management and the Use of Radio Frequency Spectrum and the Geostationary Orbit, Athens, Greece, September 9-13, 1991.

Struzak R:  Utilization de la Banque de Donnees Topographiques, (Invited), Cycle d’Etudes Regional sur la Gestion des Frequences et l’Utilisation des Frequenences Radioelectriques et de l’Orbite des Satellites Geostationnaires, Praia, Cap Vert, 28 octobre -1er novembre, 1991, Doc. No. 6; (In French)  Note: This is an up-dated French version of the paper presented at the IFRB/ BDT Regional Seminar on Frequency Management and the Use of Radio Frequency Spectrum and the Geostationary Orbit, Athens, Greece, September 9-13, 1991.

Struzak R:  CCIR Software for Personal Computers, (Invited); Proceedings of the International Commsphere ’91 Symposium, Herzlia, Israel, December, 15-19, 1991, p. w521-w525

Struzak R, Kirby RC:  Frequency Allocation, CCIR & Radio Astronomy, (Invited); Proceedings of the UNESCO-IAU-ICSU-Meeting on Adverse Environmental Impacts on Astronomy, Paris, June 30 – July 2, 1992,

Struzak R, Kirby RC:  Evolution of Radio Communications and Future ITU, (Invited); Proceedings of the 11th International Wroclaw Symposium on Electromagnetic Compatibility, Wroclaw, September 2-4, 1992

Struzak R:  Information System for Future Spectrum Management, (Invited) Proceedings of the ITU Regional Seminar on Spectrum Management, Wroclaw, Poland, 6-8 July 1994

Struzak R:  Radio Spectrum Management for System Planning, (Invited), Lecture notes, Fourth ICTP-URSI-ITU/BDT College on Radio propagation, International Centre for Theoretical Physics (ICTP) Trieste, Italy, 30 January – 3 March 1995

Struzak R:  Trends in Spectrum Management and Engineering, (Invited), 1995, Proceedings of the 11th International Zurich Symposium on Electromagnetic Compatibility, 7-9 March 1995, pages 137-142

Struzak R:  Key Issues in Spectrum Management (Invited), Proceedings of the 15th General Assembly of the International Union of Radio Science (URSI), Lille – France, August 28 – September 5, 1996, Abstracts, p. 243    Note: This is an up-dated version of the presentation at the International Wroclaw Symposium on Electromagnetic Compatibility, Wroclaw, 1996

Struzak R:  Key Issues in Spectrum Management (Invited), Proceedings of the 13th International Wroclaw Symposium on Electromagnetic Compatibility, Wroclaw, Poland, June 25-28, 1996,p.

Struzak R:  Introduction to Spectrum Management, (Invited paper), Proceedings of the Conference on Methods and Algorithms for Radio Channel Assignment, University of Oxford, 8-10 April 1997

Struzak R:  Power Assignment Under Constraints, (Invited), Proceedings of the Conference on Methods and Algorithms for Radio Channel Assignment, University of Oxford, 8-10 April 1997

Struzak R:  Some Comments on Spectrum Management, (Invited), Proceedings of the Radiocommunication Agency Research Seminar on Good Spectrum Management, London Cumberland Lodge (United Kingdom), 21-22 January 1997

Struzak R:  Spectrum Management Techniques for the 21st Century (Invited), Proceedings of the Commsphere 1997 – International Discussion forum on the Future of Telecommunications and the Electromagnetic Environment, Lausanne, Switzerland, February 11-14, 1997, p. 26-31

Struzak R:  The International Telecommunication Union: What it is and how it works, (Invited), Radio Africa: Proceedings of the 2nd Regional Workshop on the Development of radio Communication in Africa, KCCT Nairobi, Kenya, 4-8 August 1997, p. 523-527

Struzak R:  Digital terrain Models and Computer-Aided Planning for TV and Radio Broadcasting, (Invited), Radio Africa: Proceedings of the 2nd Regional Workshop on the Development of radio Communication in Africa, KCCT Nairobi, Kenya, 4-8 August 1997 (Note: This presentation has not been printed in the volume due to editors’ mistake)

Struzak R:  Spectrum Management and Utilization, (Invited), Radio Africa: Proceedings of the 2nd Regional Workshop on the Development of radio Communication in Africa, KCCT Nairobi, Kenya, 4-8 August 1997, p. 348-376

Struzak R:  Spectrum Management – Technical Aspects (Invited), Lecture notes issued at the Workshop on Telecommunications Science, Technology and Applications ICTP 15 September – 3 October 1997, the International Centre for Theoretical Physics, Trieste, Italy

Struzak R:  Spectrum Engineering (Invited), Lecture notes issued at the Workshop on Telecommunications Science, Technology and Applications ICTP 15 September – 3 October 1997, the International Centre for Theoretical Physics, Trieste, Italy

Struzak R:  A Note on Frequency Selection for Collocated Transmitters, (Invited), Lecture notes issued at the Workshop on Telecommunications Science, Technology and Applications ICTP 15 September – 3 October 1997, the International Centre for Theoretical Physics, Trieste, Italy

Struzak R:  The ITU: What It Is, How It Works, (Invited), Lecture notes issued at the Workshop on Telecommunications Science, Technology and Applications ICTP 15 September – 3 October 1997, the International Centre for Theoretical Physics, Trieste, Italy

Struzak R:  New Trends in National Spectrum Management, (Invited), Lecture notes issued at the Workshop on Telecommunications Science, Technology and Applications ICTP 15 September – 3 October 1997, the International Centre for Theoretical Physics, Trieste, Italy

Struzak R:  Tutorial on Spectrum Management and Monitoring (Invited), Proceedings of the Commsphere Africa 98 – Spectrum Management and Monitoring, Dakar, Senegal, 20-22 July 1998

Struzak R:  Computing Tools in Support of RF Spectrum Management (Invited), Proceedings of the 14th International Wroclaw Symposium on Electromagnetic Compatibility, Wroclaw, Poland, June 23-25, 1998, p. 648-653

Struzak R:  Cellular to Satellite: Proceedings of the Commonwealth Business Forum, Ottawa, 28-30 September 1998, published by Hanson Cooke, London,

Struzak R:  The ITU Radio Regulations Board (Invited), Proceedings of the ITU BR Radiocommunication Seminar on Spectrum Management, Geneva, 28 September – 2 October 1998, p. 9-16

Struzak R:  Spread-Spectrum Basics (Invited), Lecture notes issued at the Radiocommunication Agency Research Seminar on Good Spectrum Management, London Gatwick (United Kingdom), 12-13 January 1999, 17 pages

Struzak R:  Spectrum Management/ Utilization and Wireless Telecommunications; Proceedings of 13th International Zurich Symposium on Electromagnetic Compatibility 1999, Supplement,ISBN 3-9521199-4-6p. 205-212,