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Madden, L. R.; Mortisen, D. J.; Sussman, E. M.; Dupras, S. K.; Fugate, J. A.; Cuy, J. L.; Hauch, K. D.; Laflamme, M. A.; Murry, C. E.; Ratner, B. D. . (2010). Proangiogenic scaffolds as functional templates for cardiac tissue engineering. Proceedings of the National Academy of Sciences, 107(34), 15211–15216. doi:10.1073/pnas.1006442107 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research