TY  - BOOK
AU  - Samolenko,A.M.
AU  - Ronto,N.I..
AU  - shokurov,Vladimir  .
TI  - Numerical - analytic methods of investigating periodic solutions / 
U1  - 515 
PY  - 1990///
CY  - Moscow : 
PB  - Mir Publishers , 
KW  - ANALYSIS
N1  - Includes bibliography
ER  -