Journal of Approximation Theory
Journal of Approximation Theory > 2001 > 110 > 2 > 200-228
Journal of Approximation Theory > 2001 > 112 > 2 > 189-215
Journal of Approximation Theory > 2001 > 110 > 2 > 200-228
Journal of Approximation Theory > 2001 > 112 > 2 > 189-215