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Fienberg, Kurt S.; Nunez, Manuel; Russell, Jaqueline E.; Schaefer, Klaus; Lado-Bordowsky, Olga . (2001). SPIE Proceedings [SPIE Europto Remote Sensing - Barcelona, Spain (Monday 25 September 2000)] Remote Sensing of Clouds and the Atmosphere V - <title>Accuracy of low-spatial-resolution cloud property retrieval considering horizontal cloud inhomogeneities</title>. , 4168(), 20–29. doi:10.1117/12.413864 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research