Theophilus, G. O. ., A. J. . Olusegun, and M. . Umaru. “K-Step Block Hybrid Nyström-Type Method for the Solution of Bratu Problem With Impedance Boundary Condition”. CENTRAL ASIAN JOURNAL OF MATHEMATICAL THEORY AND COMPUTER SCIENCES, vol. 5, no. 1, Jan. 2024, pp. 34-46, https://cajmtcs.casjournal.org/index.php/CAJMTCS/article/view/595.