LitovchenkoV. A. “Complete Solvability of the Cauchy Problem for Petrovskii Parabolic Equations in <em class="a-Plus-plus">S</Em&gt;-Type Spaces”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 11 (November 25, 2002): 1467-1479. Accessed December 8, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4185.