1. Khaĭrullin, R.M., 2003. Anatomic and morphometric regularities of variability of the human fingers shape and its relationship with dermatoglyphic pattern. Thesis for the degree of Doctor of Medical Sciences. Moscow, Moscow Medical Academy named after IM Sechenov, p. 324.
2. Embryological development and prevalence of digital flexion crease;Kimura;Anat. Rec.,1990
3. Digit Ratio: A Pointer to Fertility, Behavior and Health;Manning,2002
4. The ratio of 2nd to 4th length: a predictor of sperm numbers and concentration of testosterone, luteinizing hormone and oestrogen;Manning;Hum. Reprod.,1998
5. Hand asymmetry in heterosexual and homosexual men and women: relationship to 2D:4D digit ratios and other sexually dimorphic anatomical traits;Martin;Arch. Sex. Behav.,2008