Toeplitz algebras and infinite simple C*-algebras associated with reduced group C*-algebras. Shuang Zhang — 1998 Mathematica Scandinavica
Homotopy of projections and factorization in the unitary group of certain C*-algebras. Shuang Zhang — 1993 Mathematica Scandinavica
Infinite Simple C*-algebras and Reduced Cross Products of Abelian C*-algebras and Free Groups. Wojciech Szymanski; Shuang Zhang — 1997 Manuscripta mathematica