TY - JOUR AU - Uhlmann, Gunther TI - Inverse boundary value problems for partial differential equations JO - Documenta mathematica PY - 1998 SP - 77 EP - 86 VL - ICM Berlin 1998, Vol. III PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DOCMA_1998__S9__a70/ LA - en ID - DOCMA_1998__S9__a70 ER -