1. The DNA chromatin condensation expressed by the image optical density of chromosomes and heterochromatin in proliferating single human leukemic granulocytic progenitors;Smetana;J. Appl. Biomed.,2012
2. GB/T 11500-2008/ISO5-2: 2001. Photography-density Measurements. Part 2: Geometric Conditions for Transmission Density.
3. NIST reference densitometer for visual diffuse transmission density;Edwad;J. Imaging Sci. Technol.,1999
4. The measurement research of diffuse transmission color density;Rui;Metrol. Technol.,2009
5. GB/T 12823.1-2008/ISO5-1: 2001. Photography-density Measurements. Part 1: Term, Symbols, and Notations.