1. Kontroverzní biopotraviny Creator: Perlín, Ctibor and Vavreinová, Slavomíra Type: article, model:article, and TEXT Language: Czech Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
2. Malý průvodce jakostí potravin Creator: Perlín, Ctibor Type: article, model:article, and TEXT Language: Czech Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public