Actual problems of modern science: Abstracts of XXХІV International scientific-practical conference (Saint-Petersburg - Astana - Kyiv - Vienna, September 28, 2018)
Actual problems of modern science: Abstracts of XXХІІІ International scientific-practical conference (Moscow - Astana - Kharkiv - Vienna, August 30, 2018)
Actual problems of modern science: Abstracts of XXХ International scientific-practical conference (Saint-Petersburg - Astana - Kiev - Vienna, May 30, 2018)
Actual problems of modern science: Abstracts of XXХ International scientific-practical conference (Saint-Petersburg - Astana - Kiev - Vienna, May 30, 2018)