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2003 Dec 5: ±èÀÎÇö(°æºÏ´ë);  On quasihyponormal operators

2004 Oct 8: ±èÀÎÇö(¼­¿ï´ë); The Fuglede-Putnam Theorem for (p,k)-quasihyponormal operators 

2008 Apr 11: ±èÀÎÇö(ÀÎõ´ë); The Fuglede-Putnam Theorem for non-hyponormal operators 

2009 May 1: ±èÀÎÇö(ÀÎõ´ë); On the quasisimilarity for quasi-class A operators