Mustăţa, Costică. “On the Extension of Semi-Lipschitz Functions on Asymmetric Normed Spaces”. Rev. Anal. Numér. Théor. Approx. 34, no. 2 (August 1, 2005): 139–150. Accessed December 2, 2025. https://ictp.acad.ro/jnaat/journal/article/view/2005-vol34-no2-art3.