Джам, О. А. 2016. “Environmental Competence As a Factor of the Quality of Environmental Education and Environmental Safety in the System of the Principles and Strategies of Sustainable Development”. Visnyk of V. N. Karazin Kharkiv National University Series «Еcоlogy», no. 14 (September), 102-5. https://doi.org/10.26565/1992-4259-2016-14-15.