Gulac, Olena, Liudmyla Dubchak, Iuliia Iarmolenko, and Julia Yanchuk. “Cooperation of Ukraine and the European Union in the Ecological Sector: Directions and Prospects”. European Journal of Sustainable Development 8, no. 1 (February 1, 2019): 22. Accessed June 19, 2021. https://ecsdev.org/ojs/index.php/ejsd/article/view/762.