Langroudi, Majid Zerafat Angiz (2013) Inexact discretionary inputs in data envelopment analysis. In: Performance Measurement with Fuzzy Data Envelopment Analysis. Studies in Fuzziness and Soft Computing (309). Springer Berlin Heidelberg, pp. 167-189. ISBN 978-3-642-41371-1 (Print) 978-3-642-41372-8 (Online)