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A unified extension of super-efficiency in additive data envelopment analysis with integer-valued inputs and outputs: an application to a municipal bus system

Crossref DOI link: https://doi.org/10.1007/s10479-019-03448-z

Published Online: 2019-11-13

Published Print: 2020-04

Update policy: https://doi.org/10.1007/springer_crossmark_policy