Raximovich, K. K. ., K. M. Z. . kizi, and Y. M. T. . kizi. “Some Methods for Solving Fourth-Order Equations”. International Journal of Innovative Analyses and Emerging Technology, vol. 2, no. 4, May 2022, pp. 127-30, https://openaccessjournals.eu/index.php/ijiaet/article/view/1248.