TY  - JOUR
AU  - Abdi, A.
AU  - Hosseini, S.A.
TI  - Symplectic and symmetric methods for the numerical solution of some mathematical models of celestial objects
JO  - Journal of New Researches in Mathematics
VL  - 3
IS  - 3
SP  - 109
EP  - 118
PY  - 2017
DO  - 
ER  -