1. Brodovskaya E.V., Dombrovskaya A. Yu., Pyrma R.V., Azarov A.A. The specifics of critical thinking of Russian youth in the conditions of digitalization. Marketingovye kommunikatsii. 2014;(6):360–366. (In Russ.).
2. Copeland M. Relation of consumers’ buying habits to marketing methods. Harvard Business Review. 1923;(3):282–289.
3. Brown G. Measuring consumer attitudes toward products. Journal of Marketing. 1950;(5):691–698.
4. Levy S. Symbols for sale. Harvard Business Review. 1959;(4):117–124.
5. Trout J., Ries A. Positioning revisited: Why didn’t GE and RCA listen. Industrial Marketing. 1971;(11):116–118.