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Merten, Otto-Wilhelm; Al-Rubeai, Mohamed . (2011). [Methods in Molecular Biology] Viral Vectors for Gene Therapy Volume 737 || Introduction to Viral Vectors. , 10.1007/978-1-61779-095-9(Chapter 1), 1–25. doi:10.1007/978-1-61779-095-9_1 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research