List of Articles Extreme efficient Open Access Article Abstract Page Full-Text 1 - An approach to rank efficient DMUs in DEA based on combining Manhattan and infinity norms Shokrollah Ziari Manaf Sharifzadeh Open Access Article Abstract Page Full-Text 2 - Ranking efficient DMUs using the variation coefficient of weights in DEA Mojtaba Ziari Shokrollah Ziari Open Access Article Abstract Page Full-Text 3 - Ranking efficient DMUs using the infinity norm and virtual inefficient DMU in DEA Shokrollah Ziari Manaf Sharifzadeh