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Braester, Carol. (1971). Comments on ‘Fingero Imbibition in Artificial Replenishment of Ground Water through Cracked Porous Medium’ by A. P. Verma. Water Resources Research, 7(2), 440–440. doi:10.1029/wr007i002p00440 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research