References

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Pilz, M., K. Kunzmann, C. Herrmann, G. Rauch, and M. Kieser. 2019. “A Variational Approach to Optimal Two-Stage Designs.” Statistics in Medicine 38 (21): 4159–71. https://doi.org/10.1002/sim.8291.

Wassmer, G., and W. Brannath. 2016. Group Sequential and Confirmatory Adaptive Designs in Clinical Trials. Springer Series in Pharmaceutical Statistics -. Springer International Publishing.

Wassmer, G., and F. Pahlke. 2018. Rpact: Confirmatory Adaptive Clinical Trial Design and Analysis. https://www.rpact.org.

Wickham, H., R Studio, and R Core Team. 2018. Testthat: Unit Testing for R. https://cran.r-project.org/web/packages/testthat/index.html.