TY - JOUR AU - M. Ya. Zhitomirskii TI - Singularities and normal forms of even-dimensional Pfaffian equations JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1988 SP - 266 EP - 267 VL - 43 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1988_43_5_a34/ LA - en ID - RM_1988_43_5_a34 ER -