KRISHNA, K. M. Study on Discount Trends in Scientific Publications. Journal of Information and Knowledge, [S. l.], v. 56, n. 6, p. 311–314, 2020. DOI: 10.17821/srels/2019/v56i6/146342. Disponível em: https://srels.org/index.php/sjim/article/view/146342. Acesso em: 19 apr. 2025.