Kairalla, John A., Christopher S. Coffey, and Keith E. Muller. “GLUMIP 2.0: SAS/IML Software for Planning Internal Pilots”. Journal of Statistical Software 28, no. 7 (November 13, 2008): 1–32. Accessed November 21, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v028i07.