PtashnikB. I. and SymotyukM. M. (2003) “Multipoint Problem for Nonisotropic Partial Differential Equations with Constant Coefficients”, Ukrains’kyi Matematychnyi Zhurnal, 55(2), pp. 241-254. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3902 (Accessed: 25November2024).