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Stauder, Bernhard J.; Kerber, Hubert; Schumacher, Peter . (2016). Foundry sand core property assessment by 3-point bending test evaluation. Journal of Materials Processing Technology, 237(), 188–196. doi:10.1016/j.jmatprotec.2016.06.010 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research