WASON, J. OptGS: An R Package for Finding Near-Optimal Group-Sequential Designs. Journal of Statistical Software, [S. l.], v. 66, n. 2, p. 1–13, 2015. DOI: 10.18637/jss.v066.i02. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v066i02. Acesso em: 27 apr. 2024.