Dana P. Williams, The topology on the primitive ideal space of transformation group C*-algebras and C.C.R. transformation group C*-algebras, Trans. Amer. Math. Soc. 266 (1981), 335-359.

Dana P. Williams, Transformation group C*-algebras with continuous trace, J. Funct. Anal. 41 (1981), 40-76.

Dana P. Williams, Transformation group C*-algebras with Hausdorff spectrum, Illinois J. Math. 26 (1982), 317-321.

Paul S. Muhly and Dana P. Williams, Transformation group C*-algebras with continuous trace, II, J. Operator Theory 11 (1984), 109-124.

Raúl E. Curto, Paul S. Muhly, and Dana P. Williams, Cross products of strongly Morita equivalent C*-algebras, Proc. Amer. Math. Soc. 90 (1984), 528-530.

Iain Raeburn and Dana P. Williams, Pull-backs of -algebras and crossed products by certain diagonal actions, Trans. Amer. Math. Soc. 287 (1985), 755-777.

Roger R. Smith and Dana P. Williams, The decomposition propery for C*-algebras, J. Operator Theory 16 (1986), 41-74.