Spaak, P. Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;
Schwenk, K., & Spaak, P. (1997). Ecology and genetics of interspecific hybridization in Daphnia. In B. Streit, T. Städler, & C. M. Lively (Eds.), Evolutionary Ecology of Freshwater Animals (pp. 199-229). Basel: Birkhäuser.