1987
80. В. Кожухаров,
Non- conventional methods for glass materials synthesis
National school for young scientists "New Materials 12- 17- October 1987,
Varna, Bulgaria (1987)
(in Bulgarian)
81. V. Kozhukharov
"Laser beam treatment of glass surface"
Plenary lecture at 3-rd Meeting of "Physical-Chemistry of Glass Surfaces"
Tabarz, GDR, December 8-11 (1987)