Dickson, E. W.; Singh, S.; Cheung, D. S.; Wyatt, C. C.; Nugent, A. S. (2008). "Application of Lean Manufacturing Techniques in the Emergency Department". Journal of Emergency Medicine. 37 (2): 177–182. doi:10.1016/j.jemermed.2007.11.108. PMID18722732.
Langenberg, T. (2005). Standardization and Expectations. Berlin: Springer-Verlag. ISBN3-540-28112-6.