When does a reproducing female viper (Vipera aspis) ‘decide’ on her litter size?

Lourdais, Olivier ; Bonnet, Xavier ; Shine, Richard ; Taylor, Emily N.

Journal of zoology (1987), 2003-02, Vol.259 (2), p.123-129 [Periódico revisado por pares]

Oxford, UK: Cambridge University Press

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