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Thiollay, J.M. (1994). "Long-winged harrier". In del Hoyo, J.; Elliott, A.; Sargatal, J. (eds.). Handbook of the Birds of the World. Vol. 2: New World Vultures to Guineafowl. Barcelona, Spain: Lynx Edicions. p. 138. ISBN978-84-87334-15-3.
Calford, Michael B.; Wise, Lisa Z.; Pettigrew, John D. (1985). "Coding of sound location and frequency in the auditory midbrain of diurnal birds of prey, families accipitridae and falconidae". Journal of Comparative Physiology A. 157 (2): 149–160. doi:10.1007/BF01350024. ISSN1432-1351. S2CID12763493.
Calford, Michael B.; Wise, Lisa Z.; Pettigrew, John D. (1985). "Coding of sound location and frequency in the auditory midbrain of diurnal birds of prey, families accipitridae and falconidae". Journal of Comparative Physiology A. 157 (2): 149–160. doi:10.1007/BF01350024. ISSN1432-1351. S2CID12763493.
Calford, Michael B.; Wise, Lisa Z.; Pettigrew, John D. (1985). "Coding of sound location and frequency in the auditory midbrain of diurnal birds of prey, families accipitridae and falconidae". Journal of Comparative Physiology A. 157 (2): 149–160. doi:10.1007/BF01350024. ISSN1432-1351. S2CID12763493.