TY  - BOOK
AU  - Stepan, Gabor
TI  - Retarded dynamical systems: Stability and characteristic functions 
T2  - Pitman notes in mathematics series
SN  - 0470213353
AV  - QA871 S835
PY  - 1989///
CY  - Essex, england
PB  - Longman Scientific & Technical
KW  - Estabilidad
ER  -