Amin, keramatpanah, Kambiz Shahroodi, Saeed Yavarpour, and Mohsen Keramatpanah. 2016. “A Mathematical Model Designing to Achieve Cost Management in Value Chain With Combinational Approach of AHP & GP”. S O C R A T E S 4 (1), 30-51. https://socratesjournal.com/index.php/SOCRATES/article/view/179.