1. Ara, P.: Left and right projections are equivalent in Rickart C ∗-algebras. J. Algebra 120, 433–448 (1989)
2. Ara, P., Goldstein, D.: Rickart C ∗-algebras are σ-normal. Arch. Math. (Basel) 65, 505–510 (1995)
3. Ara, P., Mathieu, M.: Local Multipliers of C ∗-Algebras. Springer, London/Tokyo (2003)
4. Ara, P., Mathieu, M.: Maximal C ∗-algebras as quotients and injective envelopes of C ∗-algebras. Houst. J. Math. 34, 827–872 (2008)
5. Argerami, M., Farenick, D.R.: Injective envelopes of separable C ∗-algebras. ArXiv:math/0506309v1. [math.G.A] 15 June 2005