1. Obsah Creator: Pergl, Jan Format: bez média and svazek Type: model:article and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
2. Obsah Creator: Pergl, Jan Format: bez média and svazek Type: model:article and TEXT Language: English Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public