1. Úvodník Creator: Valenta, Jan Format: bez média and svazek Type: model:article and TEXT Language: Czech Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
2. Úvodník: presumpce chyby Creator: Valenta, Jan Format: print, bez média, and svazek Type: model:article and TEXT Subject: vědecký výzkum, scientific research, 6, and 53 Language: Czech Description: Jan Valenta. Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public