%0 Journal Article %A Jiangtao Yuan %A Guoxing Ji %T On $(n,k)$-quasiparanormal operators %J Studia Mathematica %D 2012 %P 289-301 %V 209 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm209-3-6/ %R 10.4064/sm209-3-6 %G en %F 10_4064_sm209_3_6