A New Distribution-Free Test for the Equality of Two Failure Rates. Biometrika 68(2): 423-426, 1981
Testing for equality of rates of evolution. Paleobiology 13(3): 272-285, 1987
Testing for equality of evolutionary rates. Genetics 132(1): 269-276, 1992
Tests of Equality of Dependent Correlation Coefficients. Biometrika 64(3): 645-647, 1977