TEAM, S. On the Diamond Operator Related to Nonlinear Beam Equation: Wanchak Satsanit. Thai Journal of Mathematics, [S. l.], v. 13, n. 2, p. 319–336, 2015. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/511. Acesso em: 6 may. 2024.