TY  - DATA
AU  - Zhitomirskii, Mikhail.
TI  - Typical singularities of differential 1-forms and Pfaffian equations 
T2  - Translations of Mathematical Monographs, 
SN  - 9781470445249 (online)
PY  - 1992///
CY  - Providence, R.I.
PB  - American Mathematical Society
KW  - Differential forms
KW  - Pfaffian problem
KW  - Singularities (Mathematics)
N1  - Includes bibliographical references (p. 167-170) and indexes
UR  - https://doi.org/10.1090/mmono/113
ER  -