1. The Most Wonderful Tree in the World, the Papaw Tree (Carica Papaia);Lucas,1914
2. Papaya the Medicine Tree;Tietze,2003
3. Papaya Leaf Tea for Cancer—Promoting, Researching, and Growing Papaya Leaf Teahttp://papayaleavesforcancer.com/
4. Could Papaya Leaf be a Cancer Treatment?http://superfoodprofiles.com/papaya-leaves-cancer-treatment
5. Papaya leaf: The Anti-Cancer Treatmenthttp://www.huldaclarkzappers.com/php2/papayaleaf.php