TY  - BOOK
AU  - Lasalle Joseph
AU  - Lefschetz Solomon
TI  - Stability by Liapunov's direct method with applications
U1  - 515.35 
PY  - 1963///
CY  - London
PB  - Academic Press
KW  - Calculus
KW  - Liapunov's direct method
ER  -