TY - BOOK AU - Frank,L.S. TI - Sharp error estimates in the reduction procedure for the courcive singular perturbations T2 - Report 8932 AV - QA3.R46 no.8932 PY - 1989/// CY - Nijmegen PB - : Catholic University, Department of Mathematics KW - Error analysis (Mathematics) KW - erturbations, KW - Estimation theory N1 - Includes bibliographical references ER -