1. Wikipedia, the free encyclopedia, Pineal gland, http://en.wikipedia.org/wiki/Pineal_gland.
2. Gray's Anatomy;Susan Stranding,2008
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4. The histological appearance of the human pineal gland from puberty to old age;Tapp;J Pathol,1972
5. Varying appearances of calcification in human pineal gland: a light microscopic study;Koshy;J Anat Soc India,2001