1. Pesticides Residues in the Philippines: An Analytical Perspective;Bajet,1995
2. Persistence in earthworms and potential hazards to birds of soil applied DDT, dieldrin and heptachlor;Beyer;J. Appl. Ecol.,1980
3. The accumulation and effects of environmental contaminants on snakes: a review;Campbell;Environ. Monit. Assess.,2001
4. DA, 2005. 〈www.da.gov.ph〉, website of the department of agriculture of the Philippines.
5. Driver, C. 1994. Pesticides and their effects on wildlife. In: Proceedings of the Northwest Alfalfa Seed growers Conference, Reno, US. 〈http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=10163013〉. Accessed on 24–01–2007.