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Tello, C.; Villela, T.; Torres, S.; Bersanelli, M.; Smoot, G. F.; Ferreira, I. S.; Cingoz, A.; Lamb, J.; Barbosa, D.; Perez-Becker, D.; Ricciardi, S.; Currivan, J. A.; Platania, P.; Maino, D. . (2013). The 2.3 GHz continuum survey of the GEM project. Astronomy & Astrophysics, 556(), A1–. doi:10.1051/0004-6361/20079306 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research