Ikram, Muhammad <br/><br/>
Forecasting number of ISO 14001 certifications of selected countries: application of even GM (1,1), DGM, and NDGM models.  [electronic resource] 

 -  Environmental science and pollution research international  Apr 2019 
 - 12505-12521 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1614-7499 
<br/><br/><label>Standard No.: </label>10.1007/s11356-019-04534-2  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Certification<br/>China<br/>Commerce<br/>Conservation of Natural Resources--methods<br/>Forecasting<br/>Germany<br/>Humans<br/>India<br/>Italy<br/>Japan<br/>Models, Theoretical