Asymmetric oscillators and twist mappings

[1] Alekseev V., 1968, MATH USSR SB, V6, P505, DOI [10.1070/SM1968v006n04ABEH001074, DOI 10.1070/SM1968V006N04ABEH001074]

[2] Arnold V., 1976, METHODES MATH MECANI

[3] Arrowsmith D.K., 1990, An introduction to dynamical systems

[4] DIRICHLET PROBLEM FOR WEAKLY NONLINEAR ELLIPTIC PARTIAL-DIFFERENTIAL EQUATIONS [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS, 1977, 76 : 283 - 300

[5] DIECKERHOFF R, 1987, ANN SCUOLA NORM SUP, V4, P79

[6] Fucik S., 1980, SOLVABILITY NONLINEA

[7] RESONANCE FOR JUMPING NONLINEARITIES [J]. COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS, 1982, 7 (03) : 325 - 342

[8] JUMPING NONLINEARITIES FOR NEUMANN BVPS WITH POSITIVE FORCING [J]. NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS, 1993, 20 (05) : 533 - 549

[9] HERMAN M, 1983, J LOND MATH SOC, P103

[10] PERIODIC-SOLUTIONS OF X'' + F(X,T) =O VIA POINCARE-BIRKHOFF THEOREM [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1976, 20 (01) : 37 - 52

[1] Alekseev V., 1968, MATH USSR SB, V6, P505, DOI [10.1070/SM1968v006n04ABEH001074, DOI 10.1070/SM1968V006N04ABEH001074]

[2] Arnold V., 1976, METHODES MATH MECANI

[3] Arrowsmith D.K., 1990, An introduction to dynamical systems

[4] DIRICHLET PROBLEM FOR WEAKLY NONLINEAR ELLIPTIC PARTIAL-DIFFERENTIAL EQUATIONS [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS, 1977, 76 : 283 - 300

[5] DIECKERHOFF R, 1987, ANN SCUOLA NORM SUP, V4, P79

[6] Fucik S., 1980, SOLVABILITY NONLINEA

[7] RESONANCE FOR JUMPING NONLINEARITIES [J]. COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS, 1982, 7 (03) : 325 - 342

[8] JUMPING NONLINEARITIES FOR NEUMANN BVPS WITH POSITIVE FORCING [J]. NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS, 1993, 20 (05) : 533 - 549

[9] HERMAN M, 1983, J LOND MATH SOC, P103

[10] PERIODIC-SOLUTIONS OF X'' + F(X,T) =O VIA POINCARE-BIRKHOFF THEOREM [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1976, 20 (01) : 37 - 52