KHARIBEGASHVILI, S.; MIDODASHVILI, B. On the Solvability of a Problem Nonlocal in Time for a Semilinear Multidimensional Wave Equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 1, p. 88–105, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1965. Acesso em: 6 dec. 2025.