Martsinkevitš, Julia, and Märt Põldvere. “Uniqueness of Norm-Preserving Extensions of Functionals on the Space of Compact Operators”. MATHEMATICA SCANDINAVICA 125, no. 1 (August 29, 2019): 67–83. Accessed April 26, 2024. https://www.mscand.dk/article/view/112071.