11. The BROD operational system Creator: Natenzon, M., Slabý, S., and Vitouš, V. Format: bez média and svazek Type: model:article and TEXT Subject: astronomy and BROD operational system Language: Czech Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
12. Zuskova Estetika: vpravdě současný úvod Creator: Kříž, Jaroslav Format: print Type: model:internalpart and TEXT Language: Czech Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public