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Applied Mathematics and Computation > 2011 > 218 > 3 > 919-923
Journal of Multivariate Analysis > 2006 > 97 > 6 > 1409-1436
Applied Mathematics and Computation > 2011 > 218 > 3 > 919-923
Journal of Multivariate Analysis > 2006 > 97 > 6 > 1409-1436