Tài liệu tham khảo

WikiPedia: Họ Thượng tiễn http://www.genera-gesneriaceae.at/ http://plantnet.rbgsyd.nsw.gov.au/emuwebnswlive/ob... http://gesneriads.ca/ http://www.gesneriads.ca/Articles/Weber%20-%20Scie... http://www.britannica.com/EBchecked/topic/232052 http://delta-intkey.com/angio/www/gesneria.htm http://flora.huh.harvard.edu/china/ http://hua.huh.harvard.edu/china/mss/volume18/GESN... http://persoon.si.edu/gesneriaceae/bibliography/ http://persoon.si.edu/gesneriaceae/checklist/