Płoskonka, P. “Education for Environmental Ethics in Forest Areas - the Leave No Trace Idea: Concept of Education for Environmental Ethics on Forest Areas: The Leave No Trace Idea”. Studia Ecologiae Et Bioethicae, vol. 17, no. 1, Mar. 2019, pp. 27-39, doi:10.21697/seb.2019.17.1.03.