Tài liệu tham khảo WikiPedia: Calotropis procera http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl... http://www.ipni.org/ipni/idPlantNameSearch.do?id=9... http://www.theplantlist.org/tpl1.1/record/kew-2693... https://web.archive.org/web/20120609101202/http://...
