1. On a class of operators;Brown,1953
2. The unitary equivalence of binormal operators;Brown;Amer. J. Math.,1954
3. Linear operators for which T∗T and TT∗ commute;Campbell,1972
4. Linear operators for which T∗T and TT∗ commute (II);Campbell;Pacific J. Math.,1974
5. Similarities involving normal operators on Hilbert space;Embry;Pacific J. Math.,1970