TY - JOUR AU - V. V. Vishnevskii TI - Manifolds over plural numbers and semitangent structures JO - Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara PY - 1988 SP - 35 EP - 74 VL - 20 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/INTG_1988_20_a1/ LA - ru ID - INTG_1988_20_a1 ER -