Forecasting number of ISO 14001 certifications of selected countries: application of even GM (1,1), DGM, and NDGM models
Muhammad IkramCollege of Economics and Management, Nanjing University of Aeronautics and Astronautics, 29 Jiangsu Avenue, Nanjing, 211106, China. [email protected]Amin MahmoudiDepartment of Industrial Engineering, Shiraz Branch, Islamic Azad University, Shiraz, IranSyed Zulfiqar Ali ShahFaculty of Management Sciences, International Islamic University Islamabad, Islamabad, 44000, PakistanMuhammad MohsinCollege of Economics and Management, Nanjing University of Aeronautics and Astronautics, 29 Jiangsu Avenue, Nanjing, 211106, China
2019en
ABI
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