1. On normal derivations;Anderson;Proc. Amer. Math. Soc.,1973
2. Nest Algebras;Davidson,1988
3. A remark on normal derivations;Duggal;Proc. Amer. Math. Soc.,1998
4. Another generalization of Anderson's theorem;Hong-ke;Proc. Amer. Math. Soc.,1995
5. Introduction to the Theory of Linear Nonselfadjoint Operators;Gohberg,1969