TY - JOUR AU - V. S. Balaganskii TI - Frechet differentiability of the distance function and the structure of sets JO - Matematičeskie zametki PY - 1988 SP - 725 EP - 734 VL - 44 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1988_44_6_a1/ LA - ru ID - MZM_1988_44_6_a1 ER -