Ali, Wadia. “Existence And Uniqueness Of Strong Solution For A Semi-Linear Wave Equation With Nonlinear Boundary Dissipation”. Latakia University Journal -Basic Sciences Series 38, no. 2 (December 25, 2019). Accessed July 27, 2025. https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/2537.