Aldashev, S. A. “Well-Posedness of a Mixed Problem in a Cylindrical Domain for One Class of Multidimensional Hyperbolic-Parabolic Equations”. Ukrains’kyi Matematychnyi Zhurnal, vol. 72, no. 2, Feb. 2020, pp. 280-8, https://umj.imath.kiev.ua/index.php/umj/article/view/870.