Pijoan, M. 1928. Formicidae of southern California. Journal of Entomology and Zoology 20:37-42. PDF

Pisarski, B. 1953. Mrówki okolic Kazimierza. Fragmenta Faunistica (Warsaw) 6:465-500. PDF

Pisarski, B. 1957. O wystepowaniu egzotycznych gatunków mrówek w Polsce. Fragmenta Faunistica (Warsaw) 7:283-288. PDF

Pisarski, B. 1973. Struktura spoleczna Formica (C.) exsecta Nyl. (Hymenoptera: Formicidae) i jej wplyw na morfologie, ekologie i etologie gatunku. Warszawa: Polska Akademia Nauk, Instytut Zoologiczny, 134 pp.

Pisarski, B. 1962b. Materialy do znajomosci mrówek (Formicidae, Hymenoptera) Polski. I. Gatunki z podrodzaju Coptoformica Müll. Fragmenta Faunistica (Warsaw) 10:125-136. PDF

Pisarski, B. 1967b. Ameisen (Formicidae) von Dr. J. Klapperich in Afghanistan gesammelt. Polskie Pismo Entomologiczne 37:47-51. PDF

Pisarski, B. 1970b. Badania entomofaunistyczne Instytutu Zoologicznego PAN w Karpatach. Polskie Pismo Entomologiczne 40:631-635.

Pisarski, B. 1981a. Zoocenologiczne podstawy ksztaltowania srodowiska przyrodniczego osiedla mieszkaniowego Bialoleka Dworska w Warszawie. I. Sklad gatunkowy i struktura fauny terenu projektowanego osiedla mieszkaniowego. Mrówki (Formicidae, Hymenoptera). Fragmenta Faunistica (Warsaw) 26:341-354.

Pisarski, B. 1981b. Intraspecific variations in ants of the genus Formica L. Pp. 17-25 in: Howse, P. E.; Clement, J.-L. (eds.) 1981. Biosystematics of social insects. Systematics Association Special Volume No. 19. London: Academic Press, 346 pp.

Pisarski, B.; Blum, M. S. 1988. Pheromone differentiation in Camponotus herculeanus and C. ligniperdus (Hymenoptera: Formicidae). Annales Zoologici (Warsaw) 41:527-532.

Pisarski, B.; Czechowski, W. 1987. Structure and origin of ant communities of Warsaw. P. 605 in: Eder, J.; Rembold, H. (eds.) 1987. Chemistry and biology of social insects. München: Verlag J. Peperny, xxxv + 757 pp.

Pisarski, B.; Czechowski, W. 1991. Ant communities (Hymenoptera, Formicoidea) of moist and wet deciduous forests of Central Europe. Fragmenta Faunistica (Warsaw) 35:167-172.

Pisarski, B.; Vepsäläinen, K. 1989. Competition hierarchies in ant communities (Hymenoptera, Formicidae). Annales Zoologici (Warsaw) 42:321-328.

Pisarski, B.; Vepsäläinen, K.; Ranta, E.; Ås, S.; Haila, Y.; Tiainen, J. 1982. A comparison of two methods of sampling island ant communities. Annales Entomologici Fennici 48:75-80. PDF

Peeters, C. 1984. Could the queenless ant Ophthalmopone berthoudi re-evolve a reproductive caste from its fertile workers? [Abstract.]. P. 515 in: XVII International Congress of Entomology 1984. Abstract Volume. Hamburg, Federal Republic of Germany, August 20-26, 1984. Hamburg: XVII International Congress of Entomology, 960 pp.

Peeters, C. 1987. The diversity of reproductive systems in ponerine ants. Pp. 253-254 in: Eder, J.; Rembold, H. (eds.) 1987. Chemistry and biology of social insects. München: Verlag J. Peperny, xxxv + 757 pp.

Peeters, C. 1993. Monogyny and polygyny in ponerine ants with or without queens. Pp. 234-261 in: Keller, L. (ed.) 1993. Queen number and sociality in insects. Oxford: Oxford University Press, 451 pp. PDF

Peeters, C. 1991a. The occurrence of sexual reproduction among ant workers. Biological Journal of the Linnean Society 44:141-152.

Peeters, C. 1991b. Ergatoid queens and intercastes in ants: two distinct adult forms which look morphologically intermediate between workers and winged queens. Insectes Sociaux 38:1-15.

Peeters, C.; Billen, J. P. J. 1991. A novel exocrine gland inside the thoracic appendages ('gemmae') of the queenless ant Diacamma australe. Experientia (Basel) 47:229-231.

Peeters, C.; Billen, J. P. J.; Hölldobler, B. 1992. Alternative dominance mechanisms regulating monogyny in the queenless ant genus Diacamma. Naturwissenschaften 79:572-573.

Peeters, C.; Crewe, R. M. 1986. Queenright and queenless breeding systems within the genus Pachycondyla (Hymenoptera: Formicidae). Journal of the Entomological Society of Southern Africa 49:251-255.

Peeters, C.; Higashi, S. 1989. Reproductive dominance controlled by mutilation in the queenless ant Diacamma australe. Naturwissenschaften 76:177-180.

Peeters, C.; Hölldobler, B. 1992. Notes on the morphology of the sticky "doorknobs" of larvae in an Australian Hypoponera sp. (Formicidae; Ponerinae). Psyche (Cambridge) 99:23-30.

Peeters, C.; Hölldobler, B. 1995. Reproductive cooperation between queens and their mated workers: the complex life history of an ant with a valuable nest. Proceedings of the National Academy of Sciences of the United States of America 92:10977-10979.

Notes: Reproductive biology of Harpegnathos saltator.

Penev, S.; Ronchetti, G. 1965. Ricerche sulla distribuzione delle formiche del gruppo Formica rufa nella Bulgaria nord-orientale. Collana Verde 16:305-311.

Perfecto, I.; Snelling, R. R. 1995. Biodiversity and the transformation of a tropical agroecosystem: ants in coffee plantations. Ecological Applications 5:1084-1097.

Perfecto, I.; Vandermeer, J. 1994. Understanding biodiversity loss in agroecosystems: reduction of ant diversity resulting from transformation of the coffee ecosystem in Costa Rica. Entomology (Trends in Agricultural Science) 2:7-13.

Perkins, R. C. L. 1891. Male and worker characters combined in the same individual of Stenamma westwoodi. Entomologist's Monthly Magazine 27:123-124. PDF

Perkins, R. C. L. 1924. The aculeate Hymenoptera of Devon. Report and Transactions of the Devonshire Association for the Advancement of Science, Literature and Art 55:188-241.

Notes: Ants pp. 238-241.