1.
BoichukОA, PokutnyiОО. Application of the ergodic theory to the investigation of a boundaryvalue problem with periodic operator coefficient. Ukr. Mat. Zhurn. [Internet]. 2013Mar.25 [cited 2024Nov.23];65(3):329-38. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2422