Tài liệu tham khảo WikiPedia: Dương_tử_kinh http://martinwilliams.tripod.com/hkwildstars/bauhi... http://web.hku.hk/~lramsden/bauhinintro.html https://web.archive.org/web/20051126085028/http://... https://commons.wikimedia.org/wiki/Category:Bauhin... https://species.wikimedia.org/wiki/Bauhinia_%C3%97...
