TY - JOUR AU - R. Schäfke TI - Inverse Problems in the Theory of Singular Perturbations JO - Contemporary Mathematics. Fundamental Directions PY - 2003 SP - 63 EP - 88 VL - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2003_3_a3/ LA - ru ID - CMFD_2003_3_a3 ER -