Coelli, T., Crespo, H., Plagnet, M.-A., Romano, E., Perelman, S., & Paszukiewicz, A. (2007).
Incorporating quality of service in a benchmarking model:an application to French electricity distribution operators. Vienna, Austria: CIRED. https://orbi.uliege.be/handle/2268/9088
https://hdl.handle.net/2268/9088