NIKOLSKAYA, Elena, 		ANZOROVA, Svetlana, 		POTAPOV, Sergey, 		DEKHTYAR, Galina, AND 		LEBEDEV, Kostyantyn.
" Methodical Approaches to Estimate Hotel Facilities’ Efficiency" <em>Journal of Environmental Management and Tourism</em> [Online], Volume 9 Number 8 (11 April 2019)