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Author: Wei, Changguo

• Wei, Changguo; Zhao, Xiangmei; Liu, Shudong: Pseudometrics on Ext-semigroups. (English). Czechoslovak Mathematical Journal, vol. 70 (2020), issue 2, pp. 435-451
• Liu, Junping; Wei, Changguo: Unital extensions of $AF$-algebras by purely infinite simple algebras. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 4, pp. 989-1001