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Walter, Raimund; Neumann, Jens; Hinrichsen, Kai-Olaf Martin . (2020). An extended model for filtration in gasoline particulate filters under practical driving conditions. Environmental Science & Technology, (), acs.est.0c02487–. doi:10.1021/acs.est.0c02487 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research