@article{Li2020,
author = {Li, Xieran and Herrmann, Carolin and Rauch, Geraldine},
year = {2020},
language = {eng},
copyright = {https://creativecommons.org/licenses/by/4.0/},
title = {Optimality criteria for futility stopping boundaries for group sequential designs with a continuous endpoint},
volume = {20},
url = "http://dx.doi.org/10.17169/refubium-35104",
}