I | 1963 | Budapest |
II | 1964 | Dubna |
III | 1965 | Dresden |
IV | 1966 | Prague |
V | 1968 | Alushta |
VI | 1971 | Warsaw |
VII | 1973 | Budapest |
VIII | 1975 | Dubna |
IX | 1977 | Varna |
X | 1980 | Dresden |
XI | 1983 | Bratislava |
XII | 1985 | Dubna |
XIII | 1988 | Varna |
XIV | 1990 | Warsaw |
XV | 1992 | Warsaw |
XVI | 1994 | Varna |
XVII | 1997 | Varna |
XVIII | 2001 | Varna |