Karatopraklieva M. A nonlocal boundary value problem for a class of nonlinear equations of mixed type. Ann. Sofia Univ. Fac. Math. and Inf. [Internet]. 2008 Dec. 12 [cited 2024 Nov. 22];98:143-55. Available from: https://annual.uni-sofia.bg/index.php/fmi/article/view/134