BAL, Z.; DENİZ, E. An Application of Data Envelopment Analysis to Digital Marketing Sector. Eurasian Econometrics Statistics & Emprical Economics Journal, [S. l.], p. 99–106, 2020. DOI: 10.17740/eas.stat.2020-V17-07. Disponível em: https://eurasianacademy.org/index.php/econstat/article/view/1015. Acesso em: 3 tem. 2024.