1. Abramowitz, M., Stegun, I.A. (eds.): Handbook of Mathematical Functions. Verlag Harry Deutsch, Frankfurt/Main (1984)
2. Christoph, G., Prokhorov, Yu.V., Ulyanov, V.V.: On the distribution of quadratic forms in Gaussian random variables. Theory Probab. Appl. 40(2), 250–260 (1996)
3. Christoph, G., Ulyanov, V.V.: On accurate approximation of standardized Chi-Squared distributions by Edgeworth-Chebyshev expansions. Inform. Appl. 5(1), 25–31 (2011)
4. David, F.N.: Tables of Correlation Coefficient. Cambridge University Press, Cambridge (1938)
5. Fujikoshi, Y., Ulyanov, V.V., Shimizu, R.: Multivariate Statistics: High-Dimensional and Large-Sample Approximations. Wiley, Hoboken (2010)