Paukštaitė, Gailė, and Artūras Štikonas. “The Minimizer for the Second Order differential Problem With One Nonlocal Condition”. Lietuvos matematikos rinkinys 58, no. A (December 23, 2017): 28–33. Accessed November 6, 2025. https://www.zurnalai.vu.lt/LMR/article/view/14972.