in honour of Demeter Krupka's 65th birthday
Ian Anderson, Frans Cantrijn, José F. Carinena, Michael Crampin, Manuel de Leon, Pedro L. Garcia, Vladislav Goldberg, Mark Gotay, Dan R. Grigore, Josef Jany¹ka, Jerzy Kijowski, Ivan Koláø, Oldøich Kowalski, Laszlo Kozma, Michal Lenc, Valentin Lychagin, Marco Modugno, Chaime Munoz-Masqué, Jana Musilová, Peter Olver, Geoff Prince, Willy Sarlet, Masami Sekizawa, Lajos Tamássy, Gerard Thompson, Andrzej Trautman, Alexandre Vinogradov, Raffaele Vitolo