Ibragimov N, Torrisi M, Traciná R. Some Results About Self-Adjointness of a Class of Nonlinear Wave Equations. JVTSD [Internet]. 2021 Sep. 1 [cited 2026 Oct. 17];5(3):279-83. Available from: https://lhscientificpublishing.com/index.php/jvtsd/article/view/169