[5] J. P. Fink W. S. Hall S. Khalili:
Perturbation expansions for some nonlinear wave equations. SIAM J. Appl. Math. 24 (1973), 575-595.
DOI 10.1137/0124060 |
MR 0315256
[7] J. B. Keller L. Ting:
Periodic vibrations of systems governed by nonlinear partial differential equations. Comm. Pure Appl. Math. 19 (1966), 371-420.
DOI 10.1002/cpa.3160190404 |
MR 0205520
[8] J. Kurzweil:
Exponentially stable integral manifolds, averaging principle and continuous dependence on a parameter. Czech. Math. J. 16 (91) (1966), 380-423, 463-491.
MR 0206440 |
Zbl 0186.47701
[9] J. Kurzweil:
Van der Pol perturbation of the equation for a vibrating string. Czech. Math. J. 77 (92), (1967), 558-608.
MR 0219863 |
Zbl 0164.41003
[10] M. H. Millman J. B. Keller:
Perturbation theory of nonlinear boundary-value problems. J. Math. Physics, 10 (1969), 342-361.
DOI 10.1063/1.1664849 |
MR 0237867
[12] S. I. Pochozajev:
On periodic solutions of some nonlinear hyperbolic equations. (Russian), Dokl. AN SSSR, 198 (1971), 1274-1277.
MR 0284688
[13] O. Vejvoda:
Periodic solutions of a linear and weakly nonlinear wave equation in one dimension I. Czech. Math. J. 14 (1964), 341-382.
MR 0174872
[14] O. Vejvoda:
The mixed problem and periodic solutions for a linear and weakly nonlinear wave equation in one dimension. Rozpravy ČSAV, řada mat. a přir. věd, 80 (1970), 5, Academia, Praha.
MR 0310437 |
Zbl 0278.35064
[15] V. A. Vitt: Self-excited transmission lines. (Russian), Žurn. Teoret. Fiz., 4 (1934), 144-157.
[16] M. E, Žabotinskij:
On periodic solutions of nonlinear partial differential equations. Dokl. AN SSSR, 56 (1947), 469-472.
MR 0022015