MR0375794
Van Dooren, R.
René VAN DOOREN
An Analytical Method for Certain Highly Nonlinear Periodic Differential Equations
Funkcialaj Ekvacioj. Serio Internacia
16
1973
169--180
http://fe.math.kobe-u.ac.jp/FE/Free/vol16/fe16-3-2.pdf
http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe16-169-180/fe16-169-180.pdf
http://www.ams.org/mathscinet-getitem?mr=MR0375794
fe16-169-180
1973
An Analytical Method for Certain Highly Nonlinear Periodic Differential Equations
Van Dooren, R.
Van Dooren, R.
1
Urabe, M.; Reiter, A.
Numerical computation of nonlinear forced oscillations by Galerkin's procedure
J. Math. Anal. Appl.
14
1966
107-140
MR0191104
2
Cesari, L.
Functional analysis and periodic solutions of nonlinear differential equations
Contributions to differential equations
1
1963
149-187
MR0151678
3
Van Dooren, R., Numerical computation of coupled vibrations in forced nonlinear undamped two-degree-of-freedom systems by the Galerkin method and a perturbation method based on Galerkin's procedure, Birmingham, 1971
4
Van Dooren, R., Harmonic vibrations and combination tones of summed type in forced non-linear mechanical systems, (in dutch), Doctor thesis, Free University of Brussels, 1971
5
Kantorovich, L. V.; Krylov, V. I.
Approximate methods of higher analysis
Groningen, Noordhoff
1964
MR0106537
6
Bogoliubov, N.; Mitropolski, I.
Les méthodes asymptotiques en théorie des oscillations nonlinéaires
Paris, Gauthier-Villars
1962
MR0141845