TEAM, S. Remarks on P-D Operator: Dhananjay Gopal, Erdal Karapinar. Thai Journal of Mathematics, [S. l.], v. 15, n. 2, p. 421–428, 2017. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/691. Acesso em: 11 apr. 2025.