Ito Masatoshi: Parallel results to that on powers of p-hyponormal, log-hyponormal and class A operators. In: Acta scientiarum mathematicarum, (75) 1-2. pp. 299-312. (2009)
Ito Masatoshi; Yamazaki Takeaki; Yanagida Masahiro: Generalizations of results on relations between Furuta-type inequalities. In: Acta scientiarum mathematicarum, (69) 3-4. pp. 853-862. (2003)