IvasyshenS. D., and KondurO. S. “On the Analyticity of Solutions of $\overrightarrow{2b}$-Parabolic Systems”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 2 (February 25, 2006): 160-167. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3444.