“The Existence, Uniqueness And Upper Bounds For Errors Of Six Degree Spline Interpolating The Lacunary Data (0,2,5)”. AL-Rafidain Journal of Computer Sciences and Mathematics 7, no. 2 (June 3, 2010): 49–57. Accessed June 25, 2026. https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36373.