TY  - JOUR
AU  - M. Ya. Zhitomirskii
TI  - Degeneracies of differential 1-forms and Pfaffian structures
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1991
SP  - 53
EP  - 90
VL  - 46
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1991_46_5_a1/
LA  - en
ID  - RM_1991_46_5_a1
ER  -