Gladkov, A. L., and T. V. Kavitova. “Initial-Boundary-Value Problem for a Semilinear Parabolic Equation With Nonlinear Nonlocal Boundary Conditions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 68, no. 2, Feb. 2016, pp. 162-74, https://umj.imath.kiev.ua/index.php/umj/article/view/1831.