1. Mistletoe hepatitis;Harvey;Brit Med J.,1981
2. Research International, Inc http://resrchintl.com/Ricin_Primer.html
3. Ribosome-inactivating proteins from plants;Barbieri;Biochim Biophys Acta.,1993
4. Bacterial toxins: A table of lethal amounts;Gill;Microbiol Rev.,1982