DEGENERATE HOPF-BIFURCATION FORMULAS AND HILBERTS 16TH PROBLEM

[1] Andronov A. A., 1973, ISRAEL PROGRAM SCI T

[2] ARNOLD V, 1982, GEOMETRICAL METHODS

[3] BAMON R, 1986, PUBL IHES, V64, P111

[4] BAUTIN NN, 1962, AM MATH SOC TRANSL, V5, P396

[5] BIBIKOV YN, 1979, LECT NOTES MATH, P702

[6] BONIN G, 1986, COMP METHODE CONSTAN

[7] Chen L.S., 1979, ACTA MATH SINICA, V22, P751

[8] Chow S.N., 2012, METHODS BIFURCATION

[9] A SURVEY OF QUADRATIC SYSTEMS [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1966, 2 (03) : 293 - &

[10] COPPEL WA, 9TH P C ORD PART DIF

[1] Andronov A. A., 1973, ISRAEL PROGRAM SCI T

[2] ARNOLD V, 1982, GEOMETRICAL METHODS

[3] BAMON R, 1986, PUBL IHES, V64, P111

[4] BAUTIN NN, 1962, AM MATH SOC TRANSL, V5, P396

[5] BIBIKOV YN, 1979, LECT NOTES MATH, P702

[6] BONIN G, 1986, COMP METHODE CONSTAN

[7] Chen L.S., 1979, ACTA MATH SINICA, V22, P751

[8] Chow S.N., 2012, METHODS BIFURCATION

[9] A SURVEY OF QUADRATIC SYSTEMS [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1966, 2 (03) : 293 - &

[10] COPPEL WA, 9TH P C ORD PART DIF