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Hyung Keun Kim; Ji Hyun Kim; Azlina Amir Abbas; Taek Rim Yoon. (2009). Alendronate Enhances Osteogenic Differentiation of Bone Marrow Stromal Cells: A Preliminary Study. , 467(12), 3121–3128. doi:10.1007/s11999-008-0409-y 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research