List of Articles manaf sharif Article 1 - An approach to rank efficient DMUs in DEA based on combining Manhattan and infinity norms Shokrollah Ziari Manaf Sharifzadeh Iranian Journal of Optimization , Issue 2 , Year , Winter 2017 Article 2 - Ranking efficient DMUs using the infinity norm and virtual inefficient DMU in DEA Shokrollah Ziari Manaf Sharifzadeh Iranian Journal of Optimization , Issue 5 , Year , Spring 2016