HUR, M.; HAN, S.; KIM, H.; CHO, S. Selecting an optimal set of keyword for search engine advertising. International Journal of Industrial Engineering: Theory, Applications and Practice, [S. l.], v. 22, n. 1, 2015. DOI: 10.23055/ijietap.2015.22.1.1281. Disponível em: https://journals.sfu.ca/ijietap/index.php/ijie/article/view/1281. Acesso em: 5 may. 2024.