Kulinich G. L., and Mynbaeva M. M. “Space Averaging in Parabolic Equations ”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 4 (April 17, 1992): 561-564. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7901.