Mustăţa, Costică. “Best Uniform Approximation of Semi-Lipschitz Functions by Extensions”. Rev. Anal. Numér. Théor. Approx. 36, no. 2 (August 1, 2007): 159–169. Accessed November 23, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2007-vol36-no2-art4.