For citations:
Pyanova N.V., Stolyarova E.A., Pyanov R.R., Kryzhanovskaya O.А. Cost-effectiveness of viral marketing: a case study of successful campaigns. Proceedings of the Southwest State University. Series: Economics. Sociology. Management. 2025;15(3):163-175. (In Russ.) https://doi.org/10.21869/2223-1552-2025-15-3-163-175