Diaconu, Adrian. “Remarks on Interpolation in Certain Linear Spaces (IV)”. Rev. Anal. Numér. Théor. Approx. 36, no. 2 (August 1, 2007): 139–158. Accessed November 23, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2007-vol36-no2-art3.