1. G.R. Allan, Ideals of vector-valued functions. Proc. London Math. Soc. 18 (1968), 193–216.
2. C. Anantharaman-Delaroche and J. Renault, Amenable groupoids. Monographies de L’Enseignement Mathématique, 36. L’Enseignement Mathématique, Geneva, 2000. 196 pp.
3. M.A. Bastos, C.A. Fernandes, and Yu. I. Karlovich, Spectral measures in C ∗ -algebras of singular integral operators with shifts. J. Funct. Analysis 242 (2007), 86–126.
4. R.G. Douglas, Banach algebra techniques in operator theory. Academic Press, 1972.
5. M. Ionescu and D. Williams, The generalized Effros-Hahn conjecture for groupoids. Indiana Univ. Math. J. 58 (2009), no. 6, 2489–2508.