AshyralievA. “Correct Solvability of the Difference Pade Schemes for Parabolic Equations in Holder Spaces ”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 44, no. 11, Nov. 1992, pp. 1466-7, https://umj.imath.kiev.ua/index.php/umj/article/view/8247.