共 50 条
- [1] CENTERS AND LIMIT-CYCLES OF CUBIC SYSTEMS WITH LINEAR INTEGRALS DOKLADY AKADEMII NAUK BELARUSI, 1992, 36 (7-8): : 581 - 584
- [6] THE STABILITY OF LIMIT-CYCLES ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 1981, 61 (4BIS): : T49 - T51
- [10] LIMIT-CYCLES OF QUADRATIC SYSTEMS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1980, 291 (05): : 337 - 340