fyzici 2 [vynechat] teoretická fyzika 2 [vynechat] friends and associates 1 [vynechat] physicists 1 [vynechat] priatelia a spolupracovníci 1 [vynechat] relativity theory 1 [vynechat] scientific activities 1 [vynechat] teória relativity 1 [vynechat] theoretical physics 1 [vynechat] vedecká činnosť 1 [vynechat]