Tech Report #58 (PDF) April 2012 Design Resampling for Interim Sample Size Recalculation By: Sergey Tarima, Peng He, Tao Wang, Aniko Szabo
Tarima S, He P, Wang T, Szabo A. Design resampling for interim sample size recalculation. 2012 ENAR Spring Meeting, Washington, DC, April 1-4, 2012.