1. Dragunov S. V. Customer loyalty in business structures: measures to increase loyalty and assessment of their effectiveness // News of St.Peterburg University. 2009. P.3501-3514 Access mode: http://elibrary.finec.ru/materials_files/izv/IzvSPbUEF2009_3_c100_103_s.pdf.
2. Golubkov E. P. Modern trends in marketing development // Marketing in Russia and abroad. 2000. No. 4. P.499
3. Faskhiev Kh. Consumer satisfaction and its assessment. “Marketing in Russia and abroad”. 2010. N2. P. 39-53
4. Konovalova E. G. Formation of loyal customers - a factor in the sustainable development of an enterprise // Bulletin of Polotsk State University. Economic and legal sciences. 2013.No. 6. P. 65-68.
5. Möller K. M., Hallinen K. A. Relationships Marketing Theory: Its Roots and Direction // Journal of Marketing Management. 2000. Vol. 16. P. 29-54.