Sjezdy JČSMF — JČMF + JSMF 1990 (2. část). (Czech) [Congresses of the Union of Czechoslovak (and Slovak) Mathematicians and Physicists held in August 22-24, 1990 in Nitra (Part 2)]. Pokroky matematiky, fyziky a astronomie, vol. 36 (1991), issue 5, pp. 249-261