Čiegis, Raimondas, Mečislovas Meilūnas, and Olga Subač. “Numerical Schemes for 3D Parabolic Problem With Non-Local Boundwy Condition”. Lietuvos matematikos rinkinys 44, no. spec. (December 17, 2004): 623–627. Accessed November 7, 2025. https://www.zurnalai.vu.lt/LMR/article/view/32209.