Royston, P., Barthel, F. M., Parmar, M. K., Choodari-Oskooei, B., & Isham, V. (2011). Designs for clinical trials with time-to-event outcomes based on stopping guidelines for lack of benefit. BioMed Central.

Royston, Patrick, Friederike M-S Barthel, Mahesh KB Parmar, Babak Choodari-Oskooei, και Valerie Isham. Designs for Clinical Trials With Time-to-event Outcomes Based On Stopping Guidelines for Lack of Benefit. BioMed Central, 2011.

Royston, Patrick, et al. Designs for Clinical Trials With Time-to-event Outcomes Based On Stopping Guidelines for Lack of Benefit. BioMed Central, 2011.