Schultz, R. and Seifert, B. 2026. A taxonomic revision of the Palaearctic members of the Formica cinerea, F. subpilosa and F. rufibarbis species groups (Hymenoptera: Formicidae). Soil Organisms. 98, 1 (Apr. 2026), 11–86. DOI:https://doi.org/10.25674/493.