1. Approximate formulae for the percentage points and the probability integral of the noncentral χ2 distribution;Abdel-Aty;Biometrika,1954
2. A property of the multivariate t distribution;Dunn;Ann. Math. Statist.,1965
3. On the likelihood ratio test of a normal multivariate testing problem. II;Giri;Ann. Math. Statist.,1965
4. Methods of interpolation in tables of percentage points of the incomplete beta function;Hartley;Biometrika,1941