SGEM 2016 : 16th international multidisciplinary scientific geoconference SGEM 2016, 30. June - 6, July, 2016, Albena, Bulgaria. I. Ecology, economics, education and legislation, conference proceedings. Ecology and environmental protection. Environmental legislation, multilateral relations and funding opportunities. / / reviewers L. Lavrysen, Jürgen Breuste . Sofia :  STEP92 Technology , 2016 . 1023 s . ISBN 978-619-7105-65-0
http://www.sgem.org .