An Extension of Putnam-Fuglede Theorem for Hyponormal Operators. M. Radjabalipour — 1987 Mathematische Zeitschrift
Towards a classification of maximal unicellular bands. H. Radjavi; M. Radjabalipour; P. Fillmore; G. MacDonald — 1994 Semigroup forum
Quadratic operators and invariant subspaces E. Nordgren; M. Radjabalipour; H. Radjavi; P. Rosenthal — 1988 Studia Mathematica