Actual problems of modern science: Abstracts of XLV International scientific-practical conference (Kharkiv – Vienna – Berlin – Astana, November 28, 2019)
Actual problems of modern science: Abstracts of XLV International scientific-practical conference (Kharkiv – Vienna – Berlin – Astana, November 28, 2019)
Actual problems of modern science: Abstracts of XLV International scientific-practical conference (Kharkiv – Vienna – Berlin – Astana, November 28, 2019)
Actual problems of modern science: Abstracts of XLІІІ International scientific-practical conference (Kharkiv - Vienna - Berlin, July 30, 2019)