Christensen, W. F.; A.C. Rencher (1997). "A comparison of type I error rates and power levels for seven solutions to the multivariate Behrens–Fisher problem". Communications in Statistics - Simulation and Computation. 26 (4): 1251–1273. doi:10.1080/03610919708813439.
Krishnamoorthy, K.; J. Yu (2004). "Modified Nel and Van der Merwe test for the multivariate Behrens-Fisher problem". Statistics and Probability Letters. 66 (2): 161–169. doi:10.1016/j.spl.2003.10.012.