1. Úvodník Creator: Chvoj, Zdeněk Format: print, bez média, and svazek Type: model:article and TEXT Subject: fyzika, vědecká práce, physics, scientific work, 6, and 53 Language: Czech Description: Zdeněk Chvoj. Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public