Phylogeography of the Gentianaceae Phylogeography of the Gentianaceae: Molecular phylogeny, caryology, and systematics of Gentianaceae at the University of Neuchatel, Switzerland. (Gentianaceae) http://www.unine.ch/bota/ebolab/gentianaceae/gentmain.html
Description of Gentianaceae Description of Gentianaceae: Habit and leaf form; Anatomy; Morphology; Physiology; Biochemistry; Geography. (Gentianaceae) http://biodiversity.uno.edu/delta/angio/www/gentiana.htm