EstesW. K.A descriptive approach to the dynamics of choice behavior. Behav. Sci., 1961, 6, 177–184.
4.
FellerW.An introduction to probability theory and its applications.New York: Wiley, 1950.
5.
NeimarkE. D.Effects of type of non-reinforcement and number of alternative responses in two verbal conditioning situations. J. exp. Psychol., 1956, 52, 209–221.
6.
SeigelS.Nonparametric statistics for the behavioral sciences.New York: McGraw-Hill, 1956.