„The prickly pear story”(PDF). Department of Employment, Economic Development and Innovation, State of Queensland. . Arhivat din original(PDF) la . Accesat în .
Maloney, S.K.; Dawson, T.J. (). „Ventilatory accommodation of oxygen demand and respiratory water loss in a large bird, the emu (Dromaius novaehollandiae), and a re-examination of ventilatory allometry for birds”. Physiological Zoology. 71 (6): 712–719. doi:10.1086/515997. PMID9798259.
Maloney, S.K.; Dawson, T.J. (). „Ventilatory accommodation of oxygen demand and respiratory water loss in a large bird, the emu (Dromaius novaehollandiae), and a re-examination of ventilatory allometry for birds”. Physiological Zoology. 71 (6): 712–719. doi:10.1086/515997. PMID9798259.
„The prickly pear story”(PDF). Department of Employment, Economic Development and Innovation, State of Queensland. . Arhivat din original(PDF) la . Accesat în .