Andreas Christmann. On group sequential tests based on robust location and scale estimators in the two-sample problem. Comput. Stat., 14(3):339-353, 1999. [doi]
@article{Christmann99,
title = {On group sequential tests based on robust location and scale estimators in the two-sample problem},
author = {Andreas Christmann},
year = {1999},
doi = {10.1007/s001800050020},
url = {https://doi.org/10.1007/s001800050020},
researchr = {https://researchr.org/publication/Christmann99},
cites = {0},
citedby = {0},
journal = {Comput. Stat.},
volume = {14},
number = {3},
pages = {339-353},
}