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Mónica M. Collavino; Pedro A. Sansberro; Luis A. Mroginski; O. Mario Aguilar. (2010). Comparison of in vitro solubilization activity of diverse phosphate-solubilizing bacteria native to acid soil and their ability to promotePhaseolus vulgarisgrowth. , 46(7), 727–738. doi:10.1007/s00374-010-0480-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research