1. N. M.Dott: “Discussion on Pituitary Disorders”The British Medical Journal December 24 1926 page1040.
2. G.Holmes: “Discussion on Pituitary Disorders”The British. Medical Journal December 24 1926 page1035.
3. A.Keith: “Human Morphology and Embryology ”1923 page108.
4. R. J. A.Berry: “Brain and Mind ”1928 page299.