ZadorozhnaN. M. and PtashnikB. I. (1995) “Nonlocal boundary-value problem for parabolic equations with variable coefficients”, Ukrains’kyi Matematychnyi Zhurnal, 47(7), pp. 915–921. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5485 (Accessed: 24November2024).