¬ródło: | W: 16th International Multidisciplinary Scientific GeoConference. SGEM 2016, 30 June - 6 July, 2016, Albena, Bulgaria. Conference proceedings. Book 5, Ecology, economics, education and legislation. Vol. 1, Ecology and environmental protection, environmental legislation, multilateral relations and funding opportunities. Sofia : STEF92 Technology, 2016, s. 971-978, bibliogr. 14 poz. |