How experts practice: a novel test of deliberate practice theory
Journal of Experimental Psychology Learning Memory and Cognition (2014) - Comment
pubmed: 24001022  doi: 10.1037/a0034302  issn: 1939-1285  issn: 0278-7393 

Edward K. Coughlan, A. Mark Williams, Allistair P. McRobert, Paul R. Ford