Murphy BA (May 2019). "Circadian and Circannual Regulation in the Horse: Internal Timing in an Elite Athlete". Journal of Equine Veterinary Science. 76: 14–24. doi:10.1016/j.jevs.2019.02.026. PMID31084748. S2CID87820119.
Gwinner E (November 1977). "Circannual Rhythms in Bird Migration". Annual Review of Ecology and Systematics. 8 (1): 381–405. doi:10.1146/annurev.es.08.110177.002121.
Reyes C, Milsom WK (March 2010). "Circadian and circannual rhythms in the metabolism and ventilation of red-eared sliders (Trachemys scripta elegans)". Physiological and Biochemical Zoology. 83 (2): 283–98. doi:10.1086/597518. PMID19358691. S2CID8957676.
Murphy BA (May 2019). "Circadian and Circannual Regulation in the Horse: Internal Timing in an Elite Athlete". Journal of Equine Veterinary Science. 76: 14–24. doi:10.1016/j.jevs.2019.02.026. PMID31084748. S2CID87820119.
Reyes C, Milsom WK (March 2010). "Circadian and circannual rhythms in the metabolism and ventilation of red-eared sliders (Trachemys scripta elegans)". Physiological and Biochemical Zoology. 83 (2): 283–98. doi:10.1086/597518. PMID19358691. S2CID8957676.
Murphy BA (May 2019). "Circadian and Circannual Regulation in the Horse: Internal Timing in an Elite Athlete". Journal of Equine Veterinary Science. 76: 14–24. doi:10.1016/j.jevs.2019.02.026. PMID31084748. S2CID87820119.
Reyes C, Milsom WK (March 2010). "Circadian and circannual rhythms in the metabolism and ventilation of red-eared sliders (Trachemys scripta elegans)". Physiological and Biochemical Zoology. 83 (2): 283–98. doi:10.1086/597518. PMID19358691. S2CID8957676.