== Litteratur ==
* {{cite book |isbn=9780126764505 |title=The Bipyridinium Herbicides |url=https://archive.org/details/bipyridiniumherb0000summ |last1=Summers |first1=Lindsay Anderson |year=1980 |publisher=Academic Press Inc}}
* {{cite book |title=Paraquat and Diquat (Environmental Health Criteria) |author=World Health Organization |isbn=9789241540995 |year=1985 }}
* {{cite book |isbn=0849351928 |title=Human Toxicology of Pesticides |last1=Kaloyanova |first1=Fina P. |last2=El Batawi |first2=M. A. |year=1991 |publisher=CRC Press |url-access=registration |url=https://archive.org/details/humantoxicologyo0000unse }}
Erhvervsliv Jordbrug