here are some of references
nirmukta . com/2010/01/10/how-ashoka-the-great-gave-brahmins-the-gift-of-a-song-with-which-they-conquered-india/
imdb . com/title/tt0249371/
larryfreeman . hubpages.com/hub/Ashok-A-Short-Biography-of-Ashoka-the-Great-of-India
asianhistory . about.com/od/india/a/ashoka.htm