Gorodnii MF. Approximation of a bounded solution of a linear difference equation on Z<sup class="a-plus-plus">2</sup> by solutions of corresponding boundary-value problems in a Banach space. Ukr. Mat. Zhurn. [Internet]. 1995Apr.25 [cited 2024Jul.27];47(4):535–541. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5453