The unequal variance t-test is an underused alternative to Student's t-test and the Mann–Whitney U test. Ruxton, G. D. Behavioral Ecology, 17:688–690, 2006.
bibtex   
@ARTICLE{Ruxton2006,
  author = {Ruxton, G. D.},
  title = {The unequal variance t-test is an underused alternative to Student's
	t-test and the Mann–Whitney U test},
  journal = {Behavioral Ecology},
  year = {2006},
  volume = {17},
  pages = {688--690},
  file = {:Ruxton2006.pdf:PDF},
  owner = {Tiago},
  subdatabase = {general statistics},
  timestamp = {2008.12.30}
}
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