%0 Journal Article %A Khezri, Somayeh %A Dehnokhalaji, Akram %A Hosseinzadeh Lotfi, Farhad %T A full investigation of the directional congestion in data envelopment analysis %J RAIRO. Operations Research %D 2021 %P S571-S591 %V 55 %I EDP-Sciences %U https://www.numdam.org/articles/10.1051/ro/2019092/ %R 10.1051/ro/2019092 %G en %F RO_2021__55_S1_S571_0