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Elliott, Kyle R.; Dunn, Matthew J.; Krueger, Timothy D.; Steele, David A. . (2019). Utilization of Point-of-Care Ultrasonography (POCUS) for Small Bowel Obstruction. Advanced Emergency Nursing Journal, 41(2), 107–110. doi:10.1097/tme.0000000000000237 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research