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Janalee P. Caldwell, Verônica R. L. de Oliveira, Determinants of Biparental Care in the Spotted Poison Frog, Dendrobates vanzolinii (Anura: Dendrobatidae), Copeia, Vol. 1999, No. 3 (Aug. 2, 1999), pp. 565-575
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Caldwell et al. (1999) studied this question.
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