GorodniiM. F. (1995) “Approximation of a bounded solution of a linear difference equation on Z<sup class="a-plus-plus">2</sup&gt; by solutions of corresponding boundary-value problems in a Banach space”, Ukrains’kyi Matematychnyi Zhurnal, 47(4), pp. 535–541. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5453 (Accessed: 24November2024).