Actual problems of Economics and Finance: Abstracts of ХІІ International scientific-practical conference (Kiev-St. Petersburg-Vienna, July 31, 2018)
Actual problems of modern science: Abstracts of XXIХ International scientific-practical conference (Moscow — Astana — Kharkiv — Vienna, April 30, 2018)
Actual problems of modern science: Abstracts of ХХVІ International scientific-practical conference (Saint-Petersburg - Astana - Kiev - Vienna, January 30, 2018). DOI: 10.25313/2520-2057-conf-2018/january/3412/