BALASHOVA, R.; IVCHENKO, L. Methodical principles of analysis and prognosis of tourist services market in Ukraine with mathematical modelling application. Skhid, [S. l.], n. 3(110), p. 3–9, 2013. DOI: 10.21847/1728-9343.2011.3(110).17342. Disponível em: http://skhid.kubg.edu.ua/article/view/17342. Acesso em: 26 may. 2022.