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- [1] HALES METHOD FOR COMPUTATION OF PERIODIC-SOLUTIONS OF NONLINEAR DIFFERENTIAL EQUATIONS BULLETIN DE LA CLASSE DES SCIENCES ACADEMIE ROYALE DE BELGIQUE, 1975, 61 (11): : 888 - 899
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- [5] CONSTRUCTION OF APPROXIMATE PERIODIC-SOLUTIONS FOR A SYSTEM OF NONLINEAR AUTONOMOUS DIFFERENTIAL-EQUATIONS DOPOVIDI AKADEMII NAUK UKRAINSKOI RSR SERIYA A-FIZIKO-MATEMATICHNI TA TECHNICHNI NAUKI, 1976, (12): : 1080 - 1083
- [6] PERIODIC-SOLUTIONS OF SYSTEMS OF ORDINARY DIFFERENTIAL EQUATIONS ACTA MATHEMATICA ACADEMIAE SCIENTIARUM HUNGARICAE, 1973, 24 (3-4): : 251 - 258
- [7] CONTROL METHODS FOR THE NUMERICAL COMPUTATION OF PERIODIC-SOLUTIONS OF AUTONOMOUS DIFFERENTIAL-EQUATIONS LECTURE NOTES IN CONTROL AND INFORMATION SCIENCES, 1987, 97 : 64 - 89
- [8] PERIODIC-SOLUTIONS OF NONLINEAR DIFFERENTIAL EQUATION SYSTEMS ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK, 1974, 25 (01): : 26 - 36
- [10] PERIODIC-SOLUTIONS OF NONLINEAR INTEGRO-DIFFERENTIAL EQUATIONS DOPOVIDI AKADEMII NAUK UKRAINSKOI RSR SERIYA A-FIZIKO-MATEMATICHNI TA TECHNICHNI NAUKI, 1977, (07): : 595 - 598