[1] VILLARI G.:
Criteri di esistenza di soluzioni periodiche per particolari classi di equazioni differenziali del terz' ordine non lineari. Matematiche (Catania) 19 (1964), 96-113.
MR 0173833 |
Zbl 0128.08702
[2] VILLARI G.:
Contributi alio studio dell' esistenza di soluzioni periodiche per i sistemi di equazioni differenziali ordinarie. Ann. Mat. Pura Appl. 69 (1965), 171-190.
MR 0190452
[3] REISSIG R., SANSONE G., CONTI R.:
Nichtlineare Differentialgleichungen höherer Ordnung. Cremonese, Roma, 1969.
MR 0241749 |
Zbl 0172.10801
[4] EZEILO J. O. C :
A further result on the existence of periodic solutions on the equation x"' + ax" + bx' + h(x) = p(t, x, x', x"). Math. Proc. Camb. Philos. Soc. 77 (1975), 547-551.
MR 0361285
[5] EZEILO J. O. C.:
Further results on the existence of periodic solutions of a certain third order differential equation. Atti Accad. Naz. Lincei, VIII. Ser., Rend., Cl. Sci. Fis. Mat. Nat. 64 (1978), 48-58.
MR 0542152 |
Zbl 0405.34042
[6] EZEILO J. O. C.: Periodic solutions of third-order differential equations in the past twenty five years or so. In: Invited paper presented at the 2nd Pan-African Congress of the African Mathematical Union, 23-29 March 1986, University of Jos, Nigeria.
[7] KONSTANTINOV M. S.:
Existence of periodic solutions of certain differential equation. (Russian), Differ. Uravn., Sb. Tr. Mat. Kafedr Pedinst. RSFSR 9 (1977), 48-56.
MR 0486815
[8] KONSTANTINOV M. S.:
On a third order equation. (Russian), Differ. Uravn., Sb. Tr. Mat. Kafedr Pedinst. RSFSR 11 (1978), 93-99.
MR 0512943
[9] KONSTANTINOV M. S.:
Some sufficient conditions for existence of periodic and bounded solutions of the equation x'" + ax' + g(x') + cx = Ψ(t, x, x',x"). (Russian), In: Diff. Urav. Qualitative Theory, ed I. P. Makarov. Rjazan. Gos. Ped. Inst., Rjazan, 1984, pp. 92-100.
MR 0843088
[10] ANDRES J., VORÁČEK J.:
Periodic solutions to a nonlinear parametric differential equation of the third order. Atti Accad. Naz. Lincei, VIII. Ser., Rend., Cl. Sci. Fis. Mat. Nat. 77 (1984), 81-86.
MR 0884940 |
Zbl 0607.34039
[11] MEHRI B.:
On the existence of periodic solutions for certain nonlinear differential equation. Rev. Roum. Math. Pures Appl. 23 (1978), 1367-1373.
MR 0522593
[12] ANDRES J.:
Periodic boundary value problems for certain nonlinear differential equations of the third order. Math. Slovaca 35 (1985), 305-309.
MR 0808366
[13] EZEILO J. O. C., ONYA J.: Non-resonant oscillations for third-order differential equations. J. Nig. Math. Soc. 3 (1984), 83-96.
[14] EZEILO J. O. C., NKASHAMA M. N.: Non-uniform non-resonance and existence of periodic solutions of some third order non-linear ordinary differential equations. Nonlinear Anal., Theory Methods Appl. 12 (1988), 1029-1046.
[15] EZEILO J. O. C., OMARI P.: Non-resonant oscillations for some third-order differential equations II. In: ICTP, Trieste IC/87/374 (1987).
[16] FONDA A., HABETS P.:
Periodic solutions of asymptotically positively homogeneous differential equations. Rapp., Semin. Math. Appl. Mec, Univ. Cathol. Louvain No. 130 (1988).
MR 1012200
[17] AFUWAPE A. U., OMARI P., ZANOLIN F.:
Nonlinear perturbations of differential operators with nontrivial kernel and applications to third order periodic boundary value problems. J. Math. Anal. Appl. 143 (1989), 35-56.
MR 1019448
[18] AFTABIZADEH A. R., XU J.-M., GUPTA C. P.:
Periodic boundary value problems for third order ordinary differential equations. Nonlinear Anal., Theory Methods Appl. 14 (1990), 1-10.
MR 1028242 |
Zbl 0706.34018
[19] BEBERNES J., GAINES R., SCHMITT K.:
Existence of periodic solutions for third and fourth order ordinary differential equations via coincidence degree. Ann. Soc. Sci. Brux., Ser. I (T) 88 (1974), 25-36.
MR 0340729 |
Zbl 0695.47044
[20] KONSTANTINOV M. S.:
Some sufficient conditions for the existence of periodic solutions of third order nonlinear differential equations. (Russian), Differ. Uravn., Sb. Tr. Mat. Kafedr Pedinst. RSFSR 9 (1977), 57-61.
MR 0460802