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11930109 
Journal Article 
Evaluation of air pollutants based on embedded system and PPP project performance factors 
Mei Lu; Ning Li 
2021 
Yes 
Arabian Journal of Geosciences
ISSN: 1866-7511 
14 
15 
1543 (12 pp.)-1543 (12 pp.) 
INSPEC:21636780 
has retraction 12164870 Editorial Expression of Concern: Topical Collection “Environment and Low Carbon Transportation”
has retraction 12167555 Retraction Note: