TY  - BOOK
TI  - Qualitative theory of planar differential systems
T2  - Universitext
SN  - 9783540328933 (pbk.) | 3540328939 (pbk.)
PY  - 2006///
CY  - Berlin ; | New York
PB  - Springer
UR  - http://www.loc.gov/catdir/toc/fy0709/2006924563.html | http://www.loc.gov/catdir/enhancements/fy0824/2006924563-b.html | http://www.loc.gov/catdir/enhancements/fy0824/2006924563-d.html
ER  -