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Pennypacker, Sam; Wood, Robert . (2017). A Case Study in Low Aerosol Number Concentrations Over the Eastern North Atlantic: Implications for Pristine Conditions in the Remote Marine Boundary Layer. Journal of Geophysical Research: Atmospheres, 122(22), 12,393–12,415. doi:10.1002/2017JD027493 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research