B. Seifert und R. Schultz, „A taxonomic revision of the Palaearctic ant subgenus Coptoformica Müller, 1923 (Hymenoptera, Formicidae): With 40 figures and 7 tables and an electronic supplementary information SI1, SI2, SI3“, contrib.entomol., Bd. 71, Nr. 2, S. 177–220, Dez. 2021.