TY  - BOOK
AU  - Samoilenko A M
AU  -  Ronto N I
TI  - Numerical-analytic methods of investigating perodic solutions
U1  - B33, L9 
PY  - 1979///
CY  - Moscow
PB  - MIR Publishers        
KW  -  Periodic solutions
KW  - Numerical-Analytic
N1  - Includes bibliographical references
ER  -