List of Articles Undesirable Inputs Open Access Article Abstract Page Full-Text 1 - Efficiency analysis in two-stage production systems with the presence of undesirable and reversible factors Mohammad Malmir رضا کاظمی متین Mahnaz Ahadzadeh namin 10.30495/jnrm.2022.66444.2236 Open Access Article Abstract Page Full-Text 2 - Evaluating the Efficiency of Hospital Emergencies during COVID-19 Pandemic Crisis in the Presence of Undesirable Inputs in DEA Abbasali Monzeli Behrouz Daneshian Ghasem Tohidi Masoud Sanei Shabnam Razavyan 10.30495/fomj.2021.1943126.1040