Rylková, Žaneta, Karel Stelmach, and Petr Vlček. “Overall Equipment Effectiveness Within Counterfactual Impact Evaluation Concept”. Scientific Annals of Economics and Business 64, no. SI (December 31, 2017): 29–40. Accessed July 4, 2025. https://saeb.feaa.uaic.ro/index.php/saeb/article/view/1078.