Reference
Bernhard Seifert (2003): The ant genus Cardiocondyla (Insecta: Hymenoptera: Formicidae) - a taxonomic revision of the C. elegans, C. bulgarica, C. batesii, C. nuda, C. shuckardi, C. stambuloffii, C. wroughtonii, C. emeryi, and C. minutior species groups. – Annalen des Naturhistorischen Museums in Wien – 104B: 203 - 338.