The following sources are referenced in the Genetics book.
Botstein, D., White, R. L., Skolnick, M., and Davis, R. W. (1980). “Construction of a Genetic Linkage Map in Man Using Restriction Fragment Length Polymorphisms.” American Journal of Human Genetics 32:314–331.
Hildebrand, C. E., Torney, D. C., and Wagner, R. P. (1992). "Informativeness of Polymorphic DNA Markers." Los Alamos Science 20:100–102
Weir, B. S. (1979). “Inferences about Linkage Disequilibrium.” Biometrics 35:235–254.
Weir, B. S. (1996). Genetic Data Analysis II. Sunderland, MA: Sinauer Associates.
Zaykin, D. (2004). “Bounds and Normalization of the Composite Linkage Disequilibrium Coefficient.” Genetic Epidemiology 27:252–257.