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O. U. Petring; P. Sloth Madsen. (1991). Experimental ischaemic tourniquet pain delays gastric emptying of semi-solids in healthy volunteers. , 35(4), 293–296. doi:10.1111/j.1399-6576.1991.tb03292.x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research