Precup, Radu. “Estimates of the Degree of Comonotone Interpolating Polynomials”. Anal. Numér. Théor. Approx. 11, no. 1 (August 1, 1982): 139–145. Accessed April 17, 2025. https://ictp.acad.ro/jnaat/journal/article/view/1982-vol11-nos1-2-art16.