1. Fisher, R. A. &Yates, F. (1941).Statistical Tables for Biological, Agricultural and Medical Research, 2nd ed. (in the Press). Edinburgh: Oliver and Boyd.
2. Muller, H. J. (1940). An analysis of the process of structural change in chromosomes inDrosophila.J. Genet. 40, 1–66.
3. Timoféeff-Ressovsky, N. W.,Zimmer, K. G. &Delbruck, M. (1935). Über die Natur der Genmutation und der Genstruktur.Nach. Ges. Wiss. Göttingen F.G.6.