Bereznyts’kaI. B. “Determination of the Free Term and Leading Coefficient in a Parabolic Equation”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 1 (January 25, 2003): 119-125. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3893.