1. Paraquat and Diquat: Environmental Health Criteria 39,1984
2. A fatal case of poisoning by the weedkiller paraquat;Fernando;J. Colombo General Hospital,1972
3. Paraquat;Smith;CRC Crit. Rev. Toxicol.,1976
4. Diagnosis and management of acute poisoning;Proudfoot,1982
5. Handbook of Poisoning;Driesbach,1987