List of Articles Two-stage system Open Access Article Abstract Page Full-Text 1 - Evaluation of efficiency using the product method in two-stage systems with undesirable outputs Sepideh Vatani 10.30495/ijdea.2022.68507.1169 Open Access Article Abstract Page Full-Text 2 - ساختارهای شبکه دو مرحلهای تصادفی تحت P-model: رویکردی مبتنی بر DEA S. Mehdizadeh A. R. Amirteimoori M. H. Behzadi S. Kordrostami Open Access Article Abstract Page Full-Text 3 - مدل FDH دو مرحلهای معکوس در حضور منابع مشترک فرزانه اسدی سهراب کردرستمی علیرضا امیرتیموری مرتضی بذرافشان 10.30495/ijim.2022.65675.1575 Open Access Article Abstract Page Full-Text 4 - Two-stage Production Systems under Variable Returns to Scale Technology: A DEA Approach roza azizi reza kazemi matin Open Access Article Abstract Page Full-Text 5 - Efficiency of Extended Two-Stage Systems in Presence of Triangular Fuzzy Number Manoochehr Ziyae Berentin Ghasem Tohidi Shabnam Razavyan Mahnaz Barkhordari Ahmadi 10.30495/fomj.2022.1946194.1050 Open Access Article Abstract Page Full-Text 6 - A Bounded Additive Model for Efficiency Evaluation in Two-Stage Production Systems With Negative Data Hamidreza Babaei Asil Reza Kazemi Matin Mohsen Khounsiavash Zohreh Moghaddas Open Access Article Abstract Page Full-Text 7 - Determining accurate efficiency in the presence of fuzzy data via one LP NDEA model Sajedeh Mohammadniaahmadi Amin Mostafaee Sevan Sohraiee saber Saati Open Access Article Abstract Page Full-Text 8 - Determining accurate efficiency in the presence of fuzzy data via one LP NDEA model امین مصطفایی Sajedeh Mohammadniaahmadi Sohraee Sevan saber Saati Open Access Article Abstract Page Full-Text 9 - Determining Accurate Efficiency in the Presence of Fuzzy Data via One LP NDEA Model Sajedeh Mohammadnia Ahmadi Amin Mostafaee Sohraee Sevan Saber Saati 10.71932/ijm.2024.1197962