TY  - JOUR
AU  - Eydi, Alireza
AU  - Bakhtiari, Mahnaz
TI  - A multi-product model for evaluating and selecting two layers of suppliers considering environmental factors
JO  - RAIRO - Operations Research - Recherche Opérationnelle
PY  - 2017
SP  - 875
EP  - 902
VL  - 51
IS  - 4
PB  - EDP-Sciences
UR  - http://www.numdam.org/articles/10.1051/ro/2016070/
DO  - 10.1051/ro/2016070
LA  - en
ID  - RO_2017__51_4_875_0
ER  -