1. Ballard, P. B.,and Hollingworth, L. S., both quoted in Hordijk, W . (1952).
2. Lateral dominance and right-left awareness in normal children;Belmont;Child Developm.,1963
3. The Master Hand;Blau,1946
4. Scrotal asymmetry and handedness;Chang;J. Anat.,1960
5. Left Handedness: Laterality Characteristics and their Emotional Implications;Clark,1957