1995-1997. Teletraffic Engineering Courses; Victoria Institute of Technology, Victoria, Australia
5 th Australian Teletraffic Research Seminar, Melbourne, Australia, 1990
6 th Australian Teletraffic Research Seminar, Wollongong, Australia, 1991
7 th Australian Teletraffic Research Seminar, Adelaide, Australia, 1992
8 th Australian Teletraffic Research Seminar, Melbourne, Australia, 1993
Management Workshop, Cracow, Poland, 1993
MBA - Business Administration School, Tel-Aviv University, Tel-Aviv, Israel, 1980
Session on Robustness, Trondheim, Norway 2007
Teletraffic Congress No 13, Copenhagen, Denmark, 1991
Teletraffic Congress No. 10, Montreal, Canada, 1983
Teletraffic Congress No. 12, Torino, Italy, 1988
Teletraffic Congress No. 9, Torremolinos, Spain, 1979
Teletraffic Congress No.16, Edinburgh, Scotland, 1999
Teletraffic Congress No.19, Beijing, China, 2005