Semenyshyna, I. V., and Yu. V. Teplinsky. 2003. “On the Cauchy Problem for Degenerate Difference Equations of the <em class="a-Plus-plus">m</em&gt;Th Order in a Banach Space”. Ukrains’kyi Matematychnyi Zhurnal 55 (8), 1127-37. https://umj.imath.kiev.ua/index.php/umj/article/view/3986.