Balthazart (1972) Validité de l'application de l'analyse factorielle à l'étude causale d'une séquence comportementale. Ann. Soc. Roy. Zool. Belg 102:3-34.
Balthazart (1974) Short-term effects of testosterone propionate on the behaviour of young intact male domestic ducks (Anas platryhynchos). Psychol. Belg 14:1-10.
Balthazart (1975) On the daily distribution of displays and sexual behaviour in semi-wild mallards. IRCS Med. Sci 3:404.
Balthazart (1976) A correlation analysis of the daily distribution of displays and sexual behaviours in semi-wild mallards. Psychol. Belg 16:1-26.
Balthazart (1976) Daily variations of behavioural activities and of plasma testosterone levels in the domestic duck Anas platyrhynchos. Journal of Zoology 180:155-173.
Balthazart, Deviche, Hendrick (1976) Effects of exogenous hormones on the reproductive behaviour of adult male domestic ducks. II. Correlation with morphology and hormone plasma levels. Behav. Process, in press; .
Balthazart, Hendrick (1976) Annual variation in reproductive behavior, testosterone, and plasma FSH levels in the Rouen duck, Anas platyrhynchos. Gen. Comp. Endocrinol 28:171-183.
Balthazart, Stevens (1975) Effects of testosterone propionate on the social behaviour of groups of male domestic ducklings Anas platyrhynchos L. Anim. Behav 23:926-931.
Balthazart, Stevens (1976) Social behaviour of testosterone-injected male ducklings in the presence of oestrogen-treated females. Behaviour 57:288-306.
Bendat, Piersol Random Data: Analysis and Measurement Procedures, Wiley, New York; 1974.
Benoit, Assenmacher (1959) The control by visible radiations of gonadotropic activity of the duck hypophysis. Recent Progr. Horm. Res 15:143-163.
Bünning (1936) Die endogene Tagesrhythmik als Grundlage der photoperiodischen Reaktion. Ber. Deut. Bot. Ges 54:590-607.
Croix, Hendrick, Balthazart, Franchimont (1974) Dosae radioimmunologique de l'hormone folliculo-stimulante (FSH) hypophysaire de canard à l'aide d'un système de mammifères. C. R. Soc. Biol 168:136-140.
Dolais, Valleron, Grapin, Rosselin (1970) Etude de l'hormone lutéinisante humaine (HLH) au cours du nycthemère. C. R. Acad. Sci 270:3123-3126.
Follett (1973) Circadian rhythms and photoperiodic time measurement in birds. J. Reprod. Fert. Suppl 19:5-18.
Follett (1976) Plasma follicle stimulating hormone during photoperiodically-induced sexual maturation in male Japanese quail. J. Endocrinol 69:117-126.
Follett, Davies (1975) Photoperiodicity and the neuroendocrine control of reproduction in birds. Symp. Zool. Soc. London 35:199-224.
Follett, Davies (1977) The photoperiodic induction of gonadotrophin release in quail: Events during the first long day and their blockade by sodium pentobarbitone. J. Endocrinol 72:15P.
Follett, Scanes, Cunningham (1972) A radioimmunoassay for avian LH. Journal of Endocrinology 52:369-378.
Follett, Sharp (1969) Circadian rhythmicity in photoperiodically-induced gonadotrophin release and gonadal growth in the quail. Nature (London) 223:968-971.
Franchimont, Chari, Schellen, Demoulin (1975) Relationship between gonadotrophins, spermatogenesis and seminal plasma. J. Steroid Biochem 6:1037-1041.
Fruchter Introduction to Factor Analysis, Nostrand, New York; 1954.
Gay, Sheth (1972) Evidence for a periodic release of LH in castrated male and female rats. Journal of Endocrinology 52:359-378.
Gledhill, Follett (1976) Diurnal variation and the episodic release of plasma gonadotrophins in Japanese quail during a photoperiodically-induced gonadal cycle. J. Endocrinol 71:245-257.
Gwinner (1975) Circadian and circannual rhythms in birds. Avian Biology , D. Farner, J. King, Academic Press, New York; 5.
Hendrick, Legros, Franchimont (1971) Le dosage radioimmunologie de la FSH de rat et étude radioimmunologique de la réaction croisée entre la FSH de rat, de mouton et de proc. Ann. Endocrinol 32:241-251.
Jallageas, Assenmacher, Follett (1974) Testosterone secretion and plasma luteinizing hormone concentration during a sexual cycle in the Pekin duck, and their thyrosine treatment. Gen. Comp. Endocrinol 23:472-475.
Jallageas, Follett, Assenmacher (1976) Effect of castration and/or testosterone administration on plasma LH and testosterone concentrations in the duck. Gen. Comp. Endocrinol 29:272.
Katongole, Naftolin, Short (1971) Relationship between blood levels of luteinizing hormone and testosterone in bulls and the effects of sexual stimulation. J. Endocrinol 50:457-466.
Katongole, Naftolin, Short (1974) Seasonal variations in blood luteinizing hormone and testosterone levels in rams. J. Endocrinol 60:101-106.
Lincoln (1976) Seasonal variation in the episodic secretion of luteinizing hormone and testosterone in the ram. J. Endocrinol 69:213-226.
Nicholls, Follett (1974) The photoperiodic control of reproduction in Coturnix quail The temporal pattern of LH secretion. Journal of Comparative Physiology ? A 93:301-313.
Quertenmont (1976) Variations journalière hormonales et comportementales chez le Canard domestique (Anas platyrhynchos L). Mémoire de Licence, Liège; .
Siegel Nonparametric Statistics for the Behavioral Sciences, McGraw-Hill, New York; 1956.
Stetson, Erickson (1970) A daily periodicity in pituitary gonadotrophin in white-crowned sparrows. J. Comp. Physiol 68:263-267.
Tanaka, Wilson, Mather, McFarland (1966) Diurnal variation in gonadotropic potency of the adenohypophysis of Japanese quail (Coturnix coturnix japonica). General and Comparative Endocrinology 6:1-4.
Wilson, Sharp (1975) Episodic release of luteinizing hormone in the domestic fowl. J. Endocrinol 64:77-86.