Iskenderov, B. A., and É. S. Guseinova. “Mixed Problem for the Petrovskii Well-Posed Equation in a Cylindrical Domain”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 2 (February 25, 2009): 214-230. Accessed February 8, 2023. https://umj.imath.kiev.ua/index.php/umj/article/view/3014.