Monzeli, A. et al. 2021. Evaluating the Efficiency of Hospital Emergencies during COVID-19 Pandemic Crisis in the Presence of Undesirable Inputs in DEA. Fuzzy Optimization and Modeling Journal (FOMJ). 2, 3 (Nov. 2021), 47–55. DOI:https://doi.org/10.30495/fomj.2021.1943126.1040.