• [Wiki] http://en.wikipedia.org/wiki/Motacilla_citreola.
  • [AnAge] http://genomics.senescence.info/species/entry.php?species=Motacilla_flava.
  • [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
  • [PrinPres1991] Prinzinger, R., A.Preßmar, and Schleucher, E. (1991). Body temperature in birds. Comp. Biochem. Physiol., 99A(4):499--506. doi:10.1016/0300-9629(91)90122-S.
  • [Scib2004] Ściborska, M. (2004). Breeding biology of the citrine wagtail (Motacilla citreola) in the Gdansk region (N Poland). J Ornithol, 145:41--47. doi:10.1007/s10336-003-0006-5.