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Smeding, Annique; Darnon, Céline; Souchal, Carine; Toczek-Capelle, Marie-Christine; Butera, Fabrizio; Coyne, James . (2013). Reducing the Socio-Economic Status Achievement Gap at University by Promoting Mastery-Oriented Assessment. PLoS ONE, 8(8), e71678–. doi:10.1371/journal.pone.0071678 
10.1371/journal.pone.0071678