AntCat
Nylander, W. 1846b. Additamentum adnotationum in monographiam formicarum borealium Europae. Acta Societatis Scientiarum Fennicae 2:1041-1062. PDF
Nylander, W. 1849 ("1848"). Additamentum alterum adnotationum in monographiam formicarum borealium. Acta Societatis Scientiarum Fennicae 3:25-48. PDF
Münch, W. 1980. Vorkommen von Formica uralensis im Federseegebiet. Veröffentlichungen für Naturschutz und Landschaftspflege in Baden-Württemberg 51/52:681-690.
Murakami, Y.; Kim, C. H. 1980. Is it true the occurrence of Formica (F.) yessensis Forel in Kyushu? [In Japanese.]. Ari 9:7-8.
Menozzi, C. 1923a ("1922"). Nota su un nuovo genere e nuova specie di formica parassita. Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 61:256-260. PDF
Menozzi, C. 1925b. Qualche formica nuova od interessante del Deutsch. Ent. Institut di Dahlem (Form.). Entomologische Mitteilungen. Berlin-Dahlem 14:368-371. PDF
Menozzi, C. 1929c. Una nuova specie di Formica del genere Aphaenogaster Mayr del Nord America. Bollettino del Laboratorio di Zoologia Generale e Agraria della Reale Scuola Superiore d'Agricoltura. Portici 22:282-284. PDF
Lorber, B. E. 1981a. Le groupe Formica rufa (Hym. Formicidae) en Alsace. 1) Le complexe forestier de Haguenau. Entomologiste (Paris) 37:241-250. PDF
Lomnicki, J. 1925a ("1924"). Przeglad polskich gatunków rodzaju mrówki (Formica Linné). Polskie Pismo Entomologiczne 3:151-182. PDF

Notes: Undated beyond the year 1925, but presumably appeared before the next issue (volume 4, part 1), which is dated 15 March 1925.

Le Moli, F.; Mori, A. 1986. The aggression test as a possible taxonomic tool in the Formica rufa group. Aggressive Behavior 12:93-102.
Kutter, H. 1967b. Variationsstatistische Erhebungen an Weibchen von Formica lugubris Zett. Mitteilungen der Schweizerischen Entomologischen Gesellschaft 40:63-77. PDF
Kratochvíl, J. 1941d. [Untitled. New variety, Formica cinerera var. novaki, attributed to Kratochvíl.]. P. 106 in: Novák, V.; Sadil, J. 1941. Klíc k urcování mravencu strední Evropy se zvlástním zretelem k mravencí zvírene Cech a Moravy. Entomologické Listy 4:65-115. PDF
Kneitz, G.; Gernert, W.; Rammoser, H. 1962. Hügelbauende Waldameisen (Formicidae, Gen. Formica) in den Vogesen. Waldhygiene 4:203-219.
King, R. L.; Sallee, R. M. 1952. Macropseudogynes (or pterergates?) in Formica fossaceps Buren (Formicidae). Proceedings of the Iowa Academy of Science 59:469-474.
King, R. L. 1955. Winged workers in the ant, Formica obscuriventris clivia Creighton. Proceedings of the Iowa Academy of Science 62:509-513.
Kim, B.-J.; Park, J.-Y. 1994. Systematic study of Korean Formica ants on the basis of electrophoretic data. Korean Journal of Entomology 24:131-143.
Karavaiev, V. 1928b. Eine anormale Thoraxbildung bei Formica rufibarbis F. (Fam. Formicidae). Zbirnyk Prats' Zoolohichnoho Muzeyu 5:169-170 [= Trudy. Ukrains'ka Akademiya Nauk. Fizichno-Matematichnoho Viddilu 6:473-474].
Hung, A. C. F. 1974b ("1973"). Induced mating in Formica ants (Hymenoptera: Formicidae). Entomological News 84:310-313.
Hsu, S.-L. 1970. Biometrical study on interspecific differences and affinities of the genus Formica L. (Hym. Form.). Bulletin of the Institute of Zoology Academia Sinica (Taipei) 9:69-81.
Hayashida, K. 1966. Notes on the symbiotic ants of Formica sanguinea Latreille. [In Japanese.]. Ari 4:2-4.
Halverson, D. D.; Wheeler, J.; Wheeler, G. C. 1976. Natural history of the sandhill ant, Formica bradleyi (Hymenoptera: Formicidae). Journal of the Kansas Entomological Society 49:280-303.
Gösswald, K.; Schirmer, G. 1965. Zur geographischen Verbreitung der hügelbauenden Formica-Arten. Collana Verde 16:133-144. PDF
Gösswald, K. 1951c. Versuche zum Sozialparasitismus der Ameisen bei der Gattung Formica L. Zoologische Jahrbücher. Abteilung für Systematik, Ökologie und Geographie der Tiere 80:533-582.
Gösswald, K. 1961a. Un viaggio in Italia fra le formiche del gruppo Formica rufa. Collana Verde 7:28-60.
Gösswald, K. 1987. Über System und Nomenklatur der Formica-Gruppe (Hym. Formicidae). Waldhygiene 17:97-112. PDF
Gyllenstrand, N.; Seppä, P.; Pamilo, P. 2004. Genetic differentiation in sympatric wood ants, Formica rufa and F. polyctena. Insectes Sociaux 51:139-145. PDF
Gyllenstrand, N.; Seppä, P.; Pamilo, P. 2005. Restricted gene flow between two social forms in the ant Formica truncorum. Journal of Evolutionary Biology 18:978-984. PDF
Gyllenstrand, N.; Seppä, P. 2003. Conservation genetics of the wood ant, Formica lugubris, in a fragmented landscape. Molecular Ecology 12:2931-2940. PDF
Gregg, R. E. 1952b. The female of Formica opaciventris Emery (Formicidae). Psyche (Cambridge) 59:13-19. PDF
Gregg, R. E. 1964. Distribution of the ant genus Formica in the mountains of Colorado. Leaflet. University of Colorado Museum 13:59-69.