SZUTOWSKI, Dawid. Impact of Innovation on the Market Value of Tourism Enterprises: Approaches and Metrics. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 3, n. 2, p. s. 181–200, 2015. DOI: 10.18559/nky88t39. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3848. Acesso em: 3 sep. 2026.