H. - K.  Moon, Smets, E., and Huysmans, S., ?Phylogeny of tribe Mentheae (Lamiaceae): The story of molecules and micromorphological characters?, Taxon, vol. 59, pp. 1065?1076, 2010.

H. - K.  Moon, Vinckier, S., Walker, J. B., Smets, E., and Huysmans, S., ?A search for phylogenetically informative pollen characters in the subtribe Salviinae (Mentheae : Lamiaceae)?, International Journal of Plant Sciences, vol. 169, pp. 455?471, 2008.

O.  Ryding, ?Pericarp structure and phylogeny of the Lamiaceae-Verbenaceae-complex?, Plant Systematics and Evolution, vol. 198, pp. 101?141, 1995.

H. - K.  Moon, Hong, S. - P., Smets, E., and Huysmans, S., ?Phylogenetic significance of leaf micromorphology and anatomy in the tribe Mentheae (Nepetoideae: Lamiaceae)?, Bot J Linn Soc, vol. 160, pp. 211?231, 2009.

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.

A. N.  Schmidt-Lebuhn, ?Using amplified fragment length polymorphism (AFLP) to unravel species relationships and delimitations in Minthostachys (Labiatae)?, Bot J Linn Soc, vol. 153, pp. 9?19, 2007.