TY  - RPRT
TI  - Group sequential large sample T2-like chi2 tests for multivariate observations.
AU  - John M Lachin
AU  - Samuel W Greenhouse
AU  - Oliver M Bautista
PY  - 2003
DO  - 10.1002/sim.1637
UR  - https://pubmed.ncbi.nlm.nih.gov/14566920/
ID  - 14566920
ER  -