2W. M. Howell,D. A. Black. Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method[J] 1980,Experientia(8):1014~1015
3T. C. Hsu,Helen H. Rearden. Further karyological studies on Felidae[J] 1965,Chromosoma(3):365~371