TY  - BOOK
AU  - Hahn Wolfgang
AU  - Lehnigk S H
TI  - Theory and application of Liapunov's direct mathod
U1  - 515.35 
PY  - 1963///
CY  - Englewood Cliffs
PB  - Prentice Hall
KW  - Differential equations
KW  - Liapunov's direct method
ER  -