TY  - BOOK
AU  - Dumortier Freddy
AU  -  Rodrigues Paulo R
AU  -  Roussarie Robert
TI  - Germs of differmorphisms in the plane
T2  - Lecture notes in mathematics; 902
U1  - B46, M1 
PY  - 1981///
CY  - Berlin
PB  - Springer - Verlag       
ER  -