TY  - JOUR
AU  - Piotr Mormul
TI  - Singularities of triples of vector fields on $R^{4}$: the focusing stratum
JO  - Studia Mathematica
PY  - 1988
SP  - 241
EP  - 273
VL  - 91
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-91-3-241-273/
DO  - 10.4064/sm-91-3-241-273
LA  - en
ID  - 10_4064_sm_91_3_241_273
ER  -