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http://en.wikipedia.org/wiki/Hystrix_africaeaustralis.
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Aarde, R. L. v. (1987).
Pre- and postnatal growth of the Cape porcupine Hystrix
africaeaustralis.
J. Zool., Lond., 211:25--33.
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Haim, A., Aarde, R. J. v., and Skinner, J. D. (1990).
Metabolism and thermoregulation in the Cape porcupine,
Hystrix africaeaustralis.
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Kooijman, S. (2010).
Dynamic Energy Budget theory for metabolic organisation.
Cambridge Univ. Press, Cambridge.