TY - JOUR AU - Sarkar, Subhadip TI - Performance measurement using a novel directional distance function based super efficiency model and neighbourhood theory JO - RAIRO. Operations Research PY - 2021 SP - 3617 EP - 3638 VL - 55 IS - 6 PB - EDP-Sciences UR - https://www.numdam.org/articles/10.1051/ro/2021165/ DO - 10.1051/ro/2021165 LA - en ID - RO_2021__55_6_3617_0 ER -