1. H. Bass, Algebraic K-Theory, Benjamin, New York, 1967.
2. G. Corach, A.R. Larotonda, Stable range in Banach algebras, Journal of Pure and Applied Algebra, 32 (1984), 289–300.
3. K.R. Davidson, J.L. Orr, The invertibles are connected in infinite multiplicity nest algebras, Bull. London Math. Soc., 27, (1995), 155–161.
4. Pitman Res. Notes Math. Ser;K.R. Davidson,1988
5. Series in Pure and Applied Mathematics;A. Feintuch,1982