Ashyralyev, A. “On the Problem of Determining the Parameter of a Parabolic Equation”. Ukrains’kyi Matematychnyi Zhurnal 62, no. 9 (September 25, 2010): 1200–1210. Accessed April 25, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2948.