[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.
[Todd1988]
Todd, W. T. (1988).
Hand-rearing the secretary bird Sagittarius serpentarius at
{Oklahoma City Zoo}.
Int. Zoo Yb., 27:258--263.