ALGORITHM 643: FEXACT: a FORTRAN subroutine for Fisher's exact test on unordered r×c contingency tables. - Cyrus R. Mehta; Nitin R. Patel (ACM Trans. Math. Softw., 1986)

Small-sample comparisons of confidence intervals for the difference of two independent binomial proportions. - Thomas J. Santner; Vivek Pradhan; Pralay Senchaudhuri; Cyrus R. Mehta; Ajit C. Tamhane (Comput. Stat. Data Anal., 2007)