Backlund M, Oxelman B, Bremer B (2000). "Phylogenetic relationships within the Gentianales based on NDHF and RBCL sequences, with particular reference to the Loganiaceae". American Journal of Botany. 87 (7): 1029–1043. doi:10.2307/2657003. JSTOR2657003. PMID10898781. S2CID15433433.
Backlund M, Oxelman B, Bremer B (2000). "Phylogenetic relationships within the Gentianales based on NDHF and RBCL sequences, with particular reference to the Loganiaceae". American Journal of Botany. 87 (7): 1029–1043. doi:10.2307/2657003. JSTOR2657003. PMID10898781. S2CID15433433.
Backlund M, Oxelman B, Bremer B (2000). "Phylogenetic relationships within the Gentianales based on NDHF and RBCL sequences, with particular reference to the Loganiaceae". American Journal of Botany. 87 (7): 1029–1043. doi:10.2307/2657003. JSTOR2657003. PMID10898781. S2CID15433433.
researchgate.net
Struwe, Lena. (2002). Gentianales (Coffees, Dogbanes, Gentians and Milkweeds). 10.1038/npg.els.0003732
semanticscholar.org
api.semanticscholar.org
Backlund M, Oxelman B, Bremer B (2000). "Phylogenetic relationships within the Gentianales based on NDHF and RBCL sequences, with particular reference to the Loganiaceae". American Journal of Botany. 87 (7): 1029–1043. doi:10.2307/2657003. JSTOR2657003. PMID10898781. S2CID15433433.