TY  - JOUR 
T1  - On the Ziglin-Yoshida analysis for some classes of homogeneous hamiltonian systems
JO  - Brazilian Journal of Physics
A1  - Almeida, M. A.
A1  - Moreira, I. C.
A1  - Santos, F. C.
SN  - 0103-9733
UL  - 10.1590/S0103-97331998000400022
VL  - 28 
Y1  - 1998
PB  - Brasil 
ER  -