Bevan RM, Speakman JR, Butler PJ(1995)Daily energy expenditure of tufted ducks: a comparison between indirect calorimetry, doubly labelled water and heart rate. Functional Ecology, 9:40-47.
Culebras JM, Moore FD(1977)Total body water and the exchangeable hydrogen. I. Theoretical calculation of nonaqueous exchangeable hydrogen in man. American Journal of Physiology, 232:R54-59.
Ezaki Y, Ohsako Y, Yamagishi S(2013)Re-introduction of the oriental white stork for coexistence with humans in Japan. In Soorae PS(ed)Global Re-introduction Perspectives: 2013. IUCN/SSC Reintroduction Specialist Group(RSG)& Environment Agency-ABU, Dhabi, pp. 85-89.
Gessaman JA, Nagy KA(1988)Energy metabolism: errors in gas-exchange conversion factors. Physiological Zoology, 61:507-513.