1. Ballinger, R.E. 1983. Life-history variations. pp. 241?260. In: R.B. Hucy, E.R. Pianka & T.W. Schoener (ed.) Lizard Ecology: Studies of a Model Organism, Harvard University Press, Cambridge.
2. Bart, H.L. & L.M. Page. 1992. Influence of size and phylogeny of life history variation in North American percids. pp. 553?572. In: R.L. Mayden (ed.) Systematics, Historical Ecology, and North American Freshwater Fishes, Stanford University Press, Stanford.
3. Becker, G.C. 1983. Fishes of Wisconsin. University of Wisconsin Press, Madison. 1052 pp.
4. Dixon, W.J. (ed.) 1990. BMDP statistical software manual, Volumes 1?2. University of California Press, Berkeley. 2014 pp.
5. Futuyma, D.J. 1986. Evolutionary biology, 2nd. ed. Sinauer Associates, Sunderland. 600 pp.