Sytsma, Kenneth J.; Morawetz, Jeffery; Pires, J. Chris; Nepokroeff, Molly; Conti, Elena; Zjhra, Michelle; Hall, Jocelyn C.; Chase, Mark W. (2002), "Urticalean rosids: Circumscription, rosid ancestry, and phylogenetics based on rbcL, trnL-F, and ndhF sequences", American Journal of Botany, 89 (9): 1531–1546, doi:10.3732/ajb.89.9.1531, PMID21665755
nih.gov
ncbi.nlm.nih.gov
Sytsma, Kenneth J.; Morawetz, Jeffery; Pires, J. Chris; Nepokroeff, Molly; Conti, Elena; Zjhra, Michelle; Hall, Jocelyn C.; Chase, Mark W. (2002), "Urticalean rosids: Circumscription, rosid ancestry, and phylogenetics based on rbcL, trnL-F, and ndhF sequences", American Journal of Botany, 89 (9): 1531–1546, doi:10.3732/ajb.89.9.1531, PMID21665755