Bărbătei, O., N. Cofan, and I. Stan. “Measures Related to Operator Ideals and Sparr’s Interpolation Methods”. Ann. Sofia Univ. Fac. Math. and Inf. 98 (December 12, 2008): 191–202. Accessed November 22, 2024. https://stipendii.uni-sofia.bg/index.php/fmi/article/view/138.