Mustăţa, Radu. “ On P-Derivative-Interpolating Spline Functions”. Rev. Anal. Numér. Théor. Approx. 26, no. 1 (August 1, 1997): 149–163. Accessed April 17, 2025. https://ictp.acad.ro/jnaat/journal/article/view/1997-vol26-nos1-2-art21.