Chen, Yin On the second degree Putnam-Fuglede theorem. (Chinese. English summary) Zbl 0930.47013 J. Math. Res. Expo. 19, Suppl., 241-245 (1999). MSC: 47B47 47B15 PDFBibTeX XMLCite \textit{Y. Chen}, J. Math. Res. Expo. 19, 241--245 (1999; Zbl 0930.47013)
Hou, Jinchuan; Wang, Yongming k-quasihyponormal operators on the Hilbert-Schmidt class. (Chinese. English summary) Zbl 0687.47015 J. Math. Res. Expo. 9, No. 1, 57-62 (1989). MSC: 47B20 47B47 47B10 47B15 PDFBibTeX XMLCite \textit{J. Hou} and \textit{Y. Wang}, J. Math. Res. Expo. 9, No. 1, 57--62 (1989; Zbl 0687.47015)
Du, Hongke Some characterizations of normal and hyponormal operators. (Chinese. English summary) Zbl 0558.47021 J. Math. Res. Expo. 4, No. 2, 21-23 (1984). MSC: 47B20 47B15 47A12 PDFBibTeX XMLCite \textit{H. Du}, J. Math. Res. Expo. 4, No. 2, 21--23 (1984; Zbl 0558.47021)
Ding, Hong-ming Notes on the problem of nonlinear eigenvalue. (Chinese) Zbl 0491.47009 J. Math. Res. Expo. 1982, No. 2, 35-40 (1982). MSC: 47A70 47B15 47B06 47A50 47A65 PDFBibTeX XMLCite \textit{H.-m. Ding}, J. Math. Res. Expo. 1982, No. 2, 35--40 (1982; Zbl 0491.47009)