ODA, Shigeto, et al. “Change in Phenotypic Plasticity of a Morphological Defence in Daphnia Galeata (Crustacea: Cladocera) in a Selection Experiment”. Journal of Limnology, vol. 66, no. 2, Aug. 2007, pp. 142-5, doi:10.4081/jlimnol.2007.142.