Authors
Jaroslav Demko
Department of Biology and Ecology, Faculty of Education, Catholic University in Ružomberok, Ružomberok
Ján Machava
Institute of Transdisciplinary Environmental Studies, Faculty of Education, Catholic University in Ružomberok, Ružomberok
Miroslav Saniga
Department of Biology and Ecology, Faculty of Education, Catholic University in Ružomberok, Ružomberok