Tatyyana Kutaeva, Irina Shavandina, Mark Dubinovskiy A Study of the Current Condition of the Services Sector of Consumer Cooperation in Volga Federal District // Russian Journal of Entrepreneurship. — 2012. — № 5 (203). — p. 167-171. — URL: http://bgscience.ru/com/lib/3479
Elena Petrenko, Lyudmila Muratova, Sergey Nikolaev, Aleksandr Muradov Economics of a holiday in public catering establishments // Creative Economy. — 2010. — № 9 (45). — p. 102-107. — URL: http://bgscience.ru/com/lib/442