PavlenkoV. N., & FedyashevM. S. (2012). Periodic solutions of a parabolic equation with homogeneous Dirichlet boundary condition and linearly increasing discontinuous nonlinearity. Ukrains’kyi Matematychnyi Zhurnal, 64(8), 1080-1088. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2642