== Liens ==
*[http://www.biodiversitylibrary.org/search.aspx?SearchTerm=Piper%20longum&SearchCat= BHL]
*[http://ecocrop.fao.org/ecocrop/srv/en/cropFindForm cropView?id=8674 FAO Ecocrop]
*[http://www.feedipedia.org/ Feedipedia]
*[http://www.botanical.com/botanical/mgmh/comindx.html Grieve's herbal]