Jump up^Gaunt, Abbot; Sandra L. L. Gaunt; Henry D. Prange; Jeremy S. Wasser (1987). “The effects of tracheal coiling on the vocalizations of cranes (Aves; Gruidae)”. Journal of Comparative Physiology A. 161 (1): 43–58. doi:1007/BF00609454.
Jump up^*Lambrecht, Kálmán (1933): Handbuch der Palaeornithologie. Gebrüder Bornträger, Berlin, p. 520
Jump up^Leslie, J. (1998). “A bird bereaved: The identity and significance of Valmiki’s kraunca”. Journal of Indian Philosophy. 26 (5): 455–487. doi:1023/A:1004335910775.