TY  - BOOK
AU  - La Salle Joseph
AU  -  Lefschetz Solomon
TI  - Stability by liapunov's direct method with applications
T2  - MAthematics in science and engineering: A series of monographs and textbooks
U1  - B7:3, K1 
PY  - 1961///
KW  - Dynamics
ER  -