TY - BOOK AU - Anastassiou,George A. TI - Approximation by multivariate singular integrals T2 - SpringerBriefs in mathematics, SN - 9781461405887 (pbk. : alk. paper) PY - 2011/// CY - New York PB - Springer KW - Approximation theory KW - Multivariate analysis KW - Singular integrals ER -