Literature
  • Petter-Rousseaux 1970
  • Observation sur l'influence de la photopériode sur l'activité sexuelle chez Microcebus murinus Miller, 1777. en captivité Ann. Biol. anim. Biochim. Biophys. 10: 203-208.
  • Albignac, Blancou 1970
  • Observation sur la reproduction et sur la pathologie des animaux du Parc Zoologique de Tsimbazaza. Bull. de Madagascar 292: 3-14.
  • 1855
  • Observation sur un Aye-aye gardé à la Réunion. C. R. Acad. Sci., 61, p 640.
  • Bolwig 1959
  • Observations and thoughts on the evolution of facial mimicry. Koedoe 2: 60-69.
  • Petter 1971
  • Observations éco-éthologiques sur deux lémuriens malagaches nocturnes: Phaner furcifer et Microcebus coquereli. La Terre et la Vie 25: 287-327.
  • Petter, Peyriéras 1970a
  • Observations éco-éthologiques sur les Lémuriens malgaches du genre Hapalemur. La Terre et la Vie 24: 356-382.
  • Petter 1975
  • Observations on Behavior and Ecology of Phaner furcifer. In: Tattersall, I. and Sussman, R. W. (Eds), Lemur Biology. Plenum Press, New York: 209-218.
  • 1992
  • Observations on reproduction, hormones, copulatory behavior, and neonatal mortality in captive Lemur mongoz (mongoose lemur). Zoo Biology 11(2): 81-97.
  • 1974
  • Observations on the dentition of the Indriidae. Am. J. phys. Anthrop. 41 (1): 107-114.
  • , Sussman 1975
  • Observations on the ecology and behavior of the mongoose lemur Lemur mongoz mongoz Linnaeus (Primates, Lemuriformes), at Ampijoroa, Madagascar. Anthropological Papers of the American Museum of Natural History 52 (4): 195-216.
  • Pariente 1975a
  • Observations ophtalmologiques des zones fovéales vraies chez Lemur catta et Hapalemur griseus. Mammalia 40: 143-151.
  • Paulian 1956
  • Observations sur la reproduction du Lemur variegatus Kerr. Le Naturaliste malgache VII 2, 1955: 223.
  • Dague, Petter 1988
  • Observations sur le Lemur rubriventer dans son milieu naturel. In: Rakotovao, L., Barre, V. and Sayer, J. (Eds), L'Equilibre des Ecosystèmes forestiers a Madagascar: Actes d'un séminaire international. IUCN, Gland, Switzerland and Cambridge UK: 78-89.
  • Petter, Hladik 1970
  • Observations sur le domaine vital et la densité de population de Loris tardigradus. Mammalia 34.3: 394-409.
  • Grandidier 1871
  • Observations sur les Propithèques de Madagascar. Extrait d’une lettre adressée à M. Milne-Edwards. C. r. hebd. Séanc. Acad. Sci., Paris 72: 231-232.
  • Ronchetti 1997
  • Occurrence of DNA sequence differences in C- heterochromatin of Eulemur coronatus and Eulemur macaco, as revealed by fluorescence resonance energy transfer. European J. Histochemistry 41: 79-90.
  • Rabemananjara 1978
  • Oeuvres Complètes - Poésie. Présence Africaine, Paris. 356 pp.
  • 1972b
  • Of lemurs and men. Natural Hist. 81(3): 32-43.
  • Houlder 1960
  • Ohabolana ou Proverbes Malgaches. Trano Printy Loterana. 216 pp. 2,318 Malagasy proverbs, with French translation by H. Noyer.
  • 1972
  • Olfactory communication in Lemur fulvus.... PhD Thesis, Duke University.
  • Schilling 1979
  • Olfactory communication in Prosimians. In: The study of Prosimian behaviour, Martin, R. D. and Doyle, G. A. (eds), Academic press, New-York: 461-542.
  • Glatston 1983
  • Olfactory communication in the Lesser Mouse Lemur (Microcebus murinus, Miller, 1777). In : Perspectives in Primate Biology (Ed. P. K. Seth), Today & Tomorrow's Printers, New Delhi: 63-73.
  • 1974
  • Olfactory communication. In: Lemur Biology, R. D. Martin, G. A. Doyle and A. C. Walker: 331-346.
  • Mertl-Millhollen 1979
  • Olfactory demarcation of territorial boundaries by a primate - Propithecus verreauxi. Folia Primatologica 32: 35-42.
  • Mertl-Millhollen 1988
  • Olfactory demarcation of territorial but not home range boundaries by Lemur catta. Folia Primatologica 50: 175-177.
  • Dubois 1978
  • Olombelona: essai sur l'existence personnelle et collective à Madagascar. L'Harmattan. 157 pp.
  • Forsyth-Major 1894
  • On Megaladapis madagascariensis, an extinct gigantic Lemuroid from Ambolisatra. Proc. Roy. Soc. Lond.
  • Major 1893
  • On Megaladapsis madagascariensis, an extinct gigantic lemuroid from Madagascar. (Abstract.) Proc. R. Soc. 54 (326): 176-179.
  • Standing 1908
  • On recently discovered subfossil primates from Madagascar. Zool. Soc. London, Trans . 18: 59-162.
  • Major 1901
  • On some characters of the skull in Lemurs and Monkeys. Proc. zool. London.
  • Beddart 1884
  • On some points in the structure of Hapalemur griseus. Proc. Zool. Soc. Lond.: 391-399.
  • Forsyth-Major 1899
  • On subfossil Mammals from Madagascar. Proc. Zool. Soc. Lond.
  • Bland-Sutton 1887
  • On the arm glands of the Lemurs. Proc. zool. Soc. Lond., p. 369.
  • 1866
  • On the Aye-aye (Chiromys, Cuvier; Chiromys madagascariensis, Desm.; Sciurus madagascariensis, Gmel., Sonnerat; Lemur psilodactylus, Schreiber, Shaw). Trans. Zoology Society London. 5 pt. 2: 33- 101, pls. 14-26.
  • 1918
  • On the external characters of the Lemurs and of Tarsius. Proc. Zool. Soc. Lond. 55: 19-53.
  • 1908
  • On the form of the brain in the extinct Lemurs of Madagascar, with some remarks on the affinities of the Indriisinae. Trans. Zool. Soc. Lond., 18: 163-177.
  • Rand 1935
  • On the habits of some Madagascar mammals. J. Mammalogy 16(2): 89-104.
  • Elliott-Smith 1903
  • On the morphology of the brain in the Mammalia, with special reference to that of the Lemurs recent and extinct. Trans. Linn. Soc. Lond. 8: 319-432.
  • 1821
  • On the natural arrangement of vertebrose animals. London Medical Repository Record 15 (1): 296-310.
  • McGrew, Marchant 1997
  • On the other hand: Current issues in and metaof the behavioral laterality of hand function in nonhuman primates. Yearbook of Phys. Anthropol. 40: 201-232.
  • Hieronimus 1609
  • On the Powerful and Greatly Famous Insula Madagascar.
  • Hahn 1971
  • On the Side of the Apes. Thomas Y. Crowell Co., NY.
  • 1994
  • Ontogeny of tooth wear of Propithecus diadema edwardsi in relation to seed predation. IPS Congress 15: 364.
  • Maple 1980
  • Orang-utan Behavior. Van Nostrand Reinhold Co.
  • 1988
  • Orang-utan Biology. Oxford Univ Press, NY.
  • Valois 1955
  • Ordre des Primates. In: P. -P. Grassé, Traité de Zoologie 17, Mammifères. Masson et Cie, Paris: 1854-2206.
  • Paolini 1994
  • Organization of extrastriate cortex in the primitive primates, Cheirogaleus and Lemur. Soc Neurosci Abstracts 20(Pt 1): 427.
  • Pereira, Pond 1995
  • Organization of white adipose tissue in Lemuridae. American Journal of Primatology. 35(1): 1 - 13.
  • 1998
  • Origin and divergence of tandem repeats of primate D4 dopamine receptor genes. Primates 39: 217
  • Humbert 1959
  • Origines présumées et affinities de la flore de Madagascar. Mémoires de l'Institut Scientifique de Madagascar, Séries b (Biol. vég.) 9: 149-187.
  • 1839
  • Ostéographie ou description iconographique comparé du squelette et du système dentaire des mammifères récents et fossiles pour servir de base à la zoologie et à la geologie. Text Vol. 1, Atlas Vol. 1. Paris.
  • Jungers 1976
  • Osteological Form and Function: The Appendicular Skeleton of Megaladapis, A Subfossil Prosimian from Madagascar. (Doctoral Dissertation. University of Michigan, Ann Arbor).
  • Jouffroy 1975
  • Osteology and myology of the lemuriform postcranial skeleton. In: Tattersall, I. and Sussman, R. W. (eds), Lemur Biology, New York and London :149-192.
  • 1984
  • Outgroup analysis and parsimony. Syst. Zool. 33: 83-103.