Ching-Ren ChiuKuo-Hsien LuSeng-Su TsangYi-Fen ChenDecomposition of meta-frontier inefficiency in the two-stage network directional distance function with quasi-fixed inputs.595-611201320Int. Trans. Oper. Res.4https://doi.org/10.1111/itor.12008db/journals/itor/itor20.html#ChiuLTC13