- [Wiki]
http://en.wikipedia.org/wiki/Vipera_berus.
- [arkive]
http://www.arkive.org/adder/vipera-berus/.
- [EngeFrit1993]
Engelmann, W.-E., Fritzsche, J., Günther, R., and Obst, F. J. (1993).
Lurche und Kriechtiere Europas.
Neumann Verlag, Radebeul.
- [ForsLind1996]
Forsman, A. and Lindell, L. E. (1996).
Resource dependent growth and body condition dynmaics in juvenile
snakes: an experiment.
Oecologia, 108:669--675.
- [From1969]
Frommhold, E. (1969).
Die Kreuzotter (Vipera berus [Linnaeus]), volume 332 of
Die Neue Brehm Bucherei.
A. Ziemsen Verlag, Wittenberg Lutherstadt.
- [Kooy2010]
Kooijman, S. (2010).
Dynamic Energy Budget theory for metabolic organisation.
Cambridge Univ. Press, Cambridge.
- [StumStri2006]
Stumpel, T. and Strijbosch, H. (2006).
Veldgids Amphibieen en reptielen.
KNNV, Utrecht.