OLEJNICZAK, Aneta. Evidence of Effectiveness of Viral Marketing Based on Case Studies. In: SZYMAŃSKA, Kamila (ed.). The Best Practice of Marketing Management in Polish and International Enterprises: The Marriage of Science and Business – Case Studies. The Academy of Management and FinancePoland: Lodz University Press,2022. p. 51–65. DOI: 10.18778/8220-842-9.06. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/793/chapter/1959. Acesso em: 14 feb. 2026.