TY  - JOUR
AU  - Grzegorz Świrszcz
TI  - Versal deformations of $D_q$-invariant 2-parameter families of planar vector fields
JO  - Annales Polonici Mathematici
PY  - 1995
SP  - 265
EP  - 281
VL  - 62
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-62-3-265-281/
DO  - 10.4064/ap-62-3-265-281
LA  - en
ID  - 10_4064_ap_62_3_265_281
ER  -