TY  - BOOK
AU  - Mitropolsky,Yu A.
AU  - Lopatin,A. K.
TI  - NONLINEAR MECHANICS, GROUPS AND SYMMETRY
SN  - 079233339X
U1  - 515.35 
PY  - 1995///
CY  - 
PB  - Kluwer Academic Publishers B. V., Dordrecht
KW  - Differential Equations
KW  - Perturbation Theory
ER  -