IvasyshenS. D., and PasichnykH. S. “On the Cauchy Problem for $\mathop {2b}\limits^ \to$ -Parabolic Systems With Growing Coefficients”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 52, no. 11, Nov. 2000, pp. 1484-96, https://umj.imath.kiev.ua/index.php/umj/article/view/4555.