Actual problems of modern science: Abstracts of XLІV International scientific-practical conference (Kharkiv – Vienna – Berlin – Astana, October 30, 2019)
Actual problems of modern science: Abstracts of XLІІІ International scientific-practical conference (Kharkiv – Vienna – Berlin – Astana, August 29, 2019)
Actual problems of modern science: Abstracts of XLІІІ International scientific-practical conference (Kharkiv – Vienna – Berlin – Astana, August 29, 2019)
Actual problems of modern science: Abstracts of XLІІІ International scientific-practical conference (Kharkiv - Vienna - Berlin, July 30, 2019)
Actual problems of modern science: Abstracts of XLІІ International scientific-practical conference (Saint Petersburg - Astana - Kyiv - Vienna, June 27, 2019)
Actual problems of modern science: Abstracts of XLІІ International scientific-practical conference (Saint Petersburg - Astana - Kyiv - Vienna, June 27, 2019)
Actual problems of modern science: Abstracts of XLІІ International scientific-practical conference (Saint Petersburg - Astana - Kyiv - Vienna, June 27, 2019)