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Livshits, M. A.; Katsova, M. M.; Livshits, I. M.; Sykora, J.; Stempels, Eric . (2009). [AIP COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - St. Andrews (Scotland) (21–25 July 2008)] AIP Conference Proceedings - Differential rotation of the corona of the Sun as a star. , (), 748–751. doi:10.1063/1.3099223 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research