Scrophulariaceae im Germplasm Resources Information Network (GRIN), USDA, ARS, National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
doi.org
John H. Chau, Nataly O’Leary, Wei-Bang Sun, Richard G. Olmstead: Phylogenetic relationships in tribe Buddlejeae (Scrophulariaceae) based on multiple nuclear and plastid markers. In: Botanical Journal of the Linnean Society. Volume 184, Issue 2, Juni 2017, S. 137–166. doi:10.1093/botlinnean/box018
Per Kornhall, Birgitta Bremer: New circumscription of the tribe Limoselleae (Scrophulariaceae) that includes the taxa of the tribe Manuleeae. In Botanical Journal of the Linnean Society. Band 146, Nr. 4, 2004, S. 453–467, doi:10.1111/j.1095-8339.2004.00341.x.