1. Doc. Ing. Martin Libra, CSc. slaví životní jubileum Creator: Nevřala, Jaroslav 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. Libra M. - Poulek V., Zdroje a využití energie Creator: Nevřala, J. Format: bez média and svazek Type: model:article and TEXT Language: Czech Description: Autor recenze: J. Nevřala Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. Volume - année - jahrgang 2012: contents - sommaire - inhalt Format: bez média and svazek Type: model:article and TEXT Language: Slovak Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public