M.  Bendiksby, Thorbek, L., Scheen, A. - C., Lindqvist, C., and Ryding, O., ?An updated phylogeny and classification of Lamiaceae subfamily Lamioideae?, Taxon, vol. 60, pp. 471?484, 2011.

A. - C.  Scheen, Bendiksby, M., Ryding, O., Mathiesen, C., Albert, V. A., and Lindqvist, C., ?MOLECULAR PHYLOGENETICS, CHARACTER EVOLUTION, AND SUPRAGENERIC CLASSIFICATION OF LAMIOIDEAE (LAMIACEAE)?, Annals of the Missouri Botanical Garden, vol. 97, pp. 191?217, 2010.