SADDLE POINTS AND MULTIPLE SOLUTIONS OF DIFFERENTIAL-EQUATIONS

[1] AMANN H, UNPUBLISHED

[2] Ambrosetti A., 1973, Journal of Functional Analysis, V14, P349, DOI 10.1016/0022-1236(73)90051-7

[3] AMBROSETTI A, 1973, ANALISI LINEARE

[4] PERIODIC SOLUTIONS OF SECOND ORDER DYNAMICAL SYSTEMS AND ISOPERIMETRIC VARIATIONAL PROBLEMS [J]. AMERICAN JOURNAL OF MATHEMATICS, 1971, 93 (01) : 1 - &

[5] BREZIS H, 1978, COMMUN PUR APPL MATH, V31, P1

[6] CASTRO A, CRITICAL POINT THEOR

[7] Castro A., 1976, REV COLOMBIANA MAT, V10, P141

[8] CASTRO A, 1978, J MATH MATH SCI, V1, P187

[9] PERIODIC-SOLUTIONS OF AUTONOMOUS HAMILTONIAN SYSTEMS OF ORDINARY DIFFERENTIAL EQUATIONS [J]. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 39 (03) : 579 - 584

[10] VARIANT OF LUSTERNIK-SCHNIRELMAN THEORY [J]. INDIANA UNIVERSITY MATHEMATICS JOURNAL, 1972, 22 (01) : 65 - &

[1] AMANN H, UNPUBLISHED

[2] Ambrosetti A., 1973, Journal of Functional Analysis, V14, P349, DOI 10.1016/0022-1236(73)90051-7

[3] AMBROSETTI A, 1973, ANALISI LINEARE

[4] PERIODIC SOLUTIONS OF SECOND ORDER DYNAMICAL SYSTEMS AND ISOPERIMETRIC VARIATIONAL PROBLEMS [J]. AMERICAN JOURNAL OF MATHEMATICS, 1971, 93 (01) : 1 - &

[5] BREZIS H, 1978, COMMUN PUR APPL MATH, V31, P1

[6] CASTRO A, CRITICAL POINT THEOR

[7] Castro A., 1976, REV COLOMBIANA MAT, V10, P141

[8] CASTRO A, 1978, J MATH MATH SCI, V1, P187

[9] PERIODIC-SOLUTIONS OF AUTONOMOUS HAMILTONIAN SYSTEMS OF ORDINARY DIFFERENTIAL EQUATIONS [J]. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 39 (03) : 579 - 584

[10] VARIANT OF LUSTERNIK-SCHNIRELMAN THEORY [J]. INDIANA UNIVERSITY MATHEMATICS JOURNAL, 1972, 22 (01) : 65 - &