Emery, 1925d PDF: 242 (Formica (Proformica) diagnosis, catalogue);
Kuznetsov-Ugamsky, 1927b PDF: 28 (Turkestan species key);
Kuznetsov-Ugamsky, 1928a PDF: 7 (central Asia species key);
Bernard, 1967a PDF: 282 (diagnosis, Western Europe species key);
Dlussky, 1969a PDF: 231 (Russia and contiguous countries, key);
Tarbinsky, 1976 PDF: 165 (Kyrghyzstan species key);
Collingwood, 1978 PDF: 92 (Iberian Peninsula species key);
Agosti & Collingwood, 1987b PDF: 287 (Balkans species key);
Atanassov & Dlussky, 1992: 287 (Bulgaria species key);
Agosti, 1994b PDF: 112 (diagnosis, review of genus);
Radchenko, 1994b: 115 (South Siberia species key);
Arakelian, 1994 PDF: 109 (Armenia species key);
Bolton, 1994: 50 (synoptic classification);
Bolton, 1995a PDF: 1052 (census);
Bolton, 1995b: 368 (catalogue);
Collingwood & Prince, 1998: 27 (Portugal species key);
Wu & Wang, 1995a: 148 (China species key);
Bolton, 2003 PDF: 130 (synopsis);
Dubovikoff, 2005b PDF: 190 (Caucasian Isthmus species key);
Cantone, 2017 PDF: 171 (brief male diagnosis);
Zhu et al., 2022 10.1016/j.aspen.2022.101875 PDF: 13 (key to Shaanxi, China extant species (workers));
Borowiec & Salata, 2022 PDF: 257 (diagnosis, key to Greece species).