List of Articles Manoochehr Ziyae Berentin Article 1 - Efficiency of Extended Two-Stage Systems in Presence of Triangular Fuzzy Number 10.30495/fomj.2022.1946194.1050 Manoochehr Ziyae Berentin Ghasem Tohidi Shabnam Razavyan Mahnaz Barkhordari Ahmadi Fuzzy Optimization and Modeling Journal , Issue 1 , Year , Winter 2022