KostyshynL. P. and ShuvarB. A. (2003) “Aggregate-Iterative Methods for the Approximation of Solutions of Boundary-Value Problems”, Ukrains’kyi Matematychnyi Zhurnal, 55(10), pp. 1425-1431. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4011 (Accessed: 27July2024).