1. Albers, F., M. Gibby and M. Austmann. 1992. A reappraisal of Pelargonium sect. Ligularia (Geraniaceae). Pl. Syst. Evol. 179: 257–276.
2. Asen, S. and R. Griesbach. 1983. High pressure liquid chromatographic analysis of flavonoids in Geranium florets as an adjunct for cultivar identification. J. Amer. Soc. Hort. Sci. 108: 845–850.
3. Becher, S. A., K. Steinmetz, K. Weising, S. Boury, D. Peltier, J. P. Renou, G. Kahl and K. Wolff. 2000. Microsatellites for cultivar identification in Pelargonium. Theor. Appl. Genet. 101: 643–651.
4. Bentvelsen, G. C. M., H. G. W. Stemkens and P. Tjeertes. 1990. Interspecific crosses in Pelargonium and the application of embryo rescue methods. Integration of in vitro techniques in ornamental plant breeding. Proc. Symp. Eucarpia Sect. 104–109.
5. Brawner, F. 2003. Geraniums: The complete encyclopedia. p. 138. Schiffer Publishing, Atglen.