- 2000-2002 Federico Ughi ...www.federicoughi.com
- Database of Kathakali Artists - Kalamandalam Unnikrishnan ...www.cyberkerala.com/kathakali/artists/unnikrishnan.htm
- Visit Sam Ulano's website, access his catalog of books, records and educational material and get charged up with this living treasure of the drum world. He is infectious.www.samulano.com
