Krausse, A. H. 1922d. Formica rufa pratensis incisa m. v. n. Entomologisches Jahrbuch 31:155.
Krausse, A. H. 1926a. Formica rufa an Weidenkätzchen. Internationale Entomologische Zeitschrift 20:107-108.
Kotzias, H. 1930. Formica picea Nyl. in Schlesien. Zoologischer Anzeiger 92:56-58.
Holgersen, H. 1943a. Formica gagatoides Ruzs. in Norway. Tromso Museums Årshefter [Aarshefter] 64:3-17. PDF
Hamm, A. H. 1902. Formica exsecta in South Devon. Entomologist's Monthly Magazine 38:266.
Dufour, L. 1856. Note sur la Formica barbara. Annales de la Société Entomologique de France (3)4:341-343. PDF
Douwes, P. 1979. Formica rufa-gruppens systematik. Entomologisk Tidskrift 100:187-191. PDF
Betrem, J. G. 1960a. Formica truncorum F. niet inheems. Entomologische Berichten (Amsterdam) 20:130-134. PDF
Dlussky, G. M. 1967a. Ants of the genus Formica (Hymenoptera, Formicidae, g. Formica). [In Russian.]. Moskva: Nauka Publishing House, 236 pp. PDF

Notes: Date signed for printing ("podpisano k pechati"). OCRed text 8.xii.2023.

Scudder, S. H. 1899. An unknown tract on American insects by Thomas Say. Psyche (Cambridge) 8:306-308. PDF

Notes: See Say (1831).

Reznikova, Z. I.; Shillerova, O. A. 1979. Ecology and behavior of Formica uralensis in the dry steppes of Tuva. [In Russian.]. Voprosy Ekologii. Novosibirskii Gosudarstvennyi Universitet 5:112-131.
Lucas, H. 1873b. [Untitled. Introduced by: "M. H. Lucas communique la rectification synonymique suivante".]. Bulletin Bimensuel de la Société Entomologique de France 5(3):lxvi-lxvii. PDF

Notes: First published as Lucas (1873a).

Zálesky, M. 1932a. Formica exsecta pressilabris Nyl. v Podk. Rusi. Casopis Ceskoslovenské Spolecnosti Entomologické 29:52-53.
Yarrow, I. H. H. 1956. Formica rufa L. (Hym., Formicidae) in Oxfordshire. Entomologist's Monthly Magazine 92:8.
Wiel, P. 1926. Formica pressilabris Nyl. in Nederland. Entomologische Berichten (Amsterdam) 7:106.
Wheeler, W. M. 1912c. New names for some ants of the genus Formica. Psyche (Cambridge) 19:90. PDF

Notes: Stamp date in MCZ library: 1912.08.01.

Wheeler, W. M. 1913i. A revision of the ants of the genus Formica (Linné) Mayr. Bulletin of the Museum of Comparative Zoology 53:379-565. PDF
Wheeler, W. M. 1915g. A new bog-inhabiting variety of Formica fusca L. Psyche (Cambridge) 22:203-206. PDF

Notes: Stamp date in MCZ library: 1916.01.04.