Actual problems of modern science: Abstracts of XXХVІ International scientific-practical conference (Moscow - Astana - Kharkiv - Vienna, December 28, 2018)

Actual problems of Economics and Finance: Abstracts of ХІІІ International scientific-practical conference (Kiev-St. Petersburg-Vienna, October 31, 2018)

Actual problems of modern science: Abstracts of XXХІІ International scientific-practical conference (Saint-Petersburg - Astana - Kiev - Vienna, July 31, 2018)

Actual problems of Economics and Finance: Abstracts of ХІІ International scientific-practical conference (Kiev-St. Petersburg-Vienna, July 31, 2018)