1 - C*-algebras by exampleDavidson, Kenneth R.Cote : [42 DAV 96]
2 - Semicrossed products of operator algebras by semigroups Davidson, Kenneth R. / Fuller, Adam H. (1984-....) / Kakariadis, Evgenios T. A. (1981-....)Cote : [42.4 DAV 17]