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Scientometrics > 2016 > 106 > 2 > 645-655
Journal of Multivariate Analysis > 2014 > 127 > Complete > 88-97
Journal of Multivariate Analysis > 2010 > 101 > 7 > 1559-1573
Economics Letters > 2010 > 107 > 2 > 249-252
Acta Biotheoretica > 2002 > 50 > 1 > 63-71