Choi, Yemon, Ebrahim Samei, and Ross Stokke. “Extension of Derivations, and Connes- Amenability of the Enveloping Dual Banach Algebra”. MATHEMATICA SCANDINAVICA 117, no. 2 (December 14, 2015): 258–303. Accessed August 14, 2026. https://tidsskrift.dk/math/article/view/22870.