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)