Periodic solutions of some linear systems of differential equations. Dang Khanh Hoi (2006) Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
Periodic solutions of the equation u t t + u x x x x = ε f ( · , · , u , u t ) Hana Petzeltová (1973) Czechoslovak Mathematical Journal
Periodic solutions of the Stefan problem with Hysteresis-Type boundary conditions. I.G. Götz, K. Hoffmann, A. Meirmanov (1993) Manuscripta mathematica
Periodic solutions of weakly nonlinear wave equations in unbounded intervals Leopold Herrmann, Milan Štědrý (1978) Czechoslovak Mathematical Journal
Periodic solutions to a one-dimensional strongly nonlinear wave equation with strong dissipation Leopold Herrmann (1985) Czechoslovak Mathematical Journal
Periodic Solutions to a Parabolic Equation with Hysteresis. Pavel Krejci (1987) Mathematische Zeitschrift
Periodic solutions to abstract differential equations Vejvoda, Otto, Straškraba, Ivan (1973) Proceedings of Equadiff III
Periodic solutions to abstract differential equations Ivan Straškraba, Otto Vejvoda (1973) Czechoslovak Mathematical Journal
Periodic solutions to linear partial differential equations of the first order Jaroslav Barták, Otto Vejvoda (1991) Czechoslovak Mathematical Journal
Periodic solutions to Maxwell equations in nonlinear media Pavel Krejčí (1986) Czechoslovak Mathematical Journal
Periodic solutions to retarded and partial functional differential equations. Pavlakos, Panaiotis K., Stratis, Ioannis G. (1994) Portugaliae Mathematica
Periodic solutions to the inhomogeneous sine-Gordon equation Nina Klimperová (1979) Commentationes Mathematicae Universitatis Carolinae
Periodic solutions to weakly nonlinear autonomous wave equations Milan Štědrý, Otto Vejvoda (1975) Czechoslovak Mathematical Journal
Periodic systems dependent on parameters. He, Min (2010) Journal of Inequalities and Applications [electronic only]
Periodic trajectories for evolution equations in Banach spaces. Voisei, Mircea D. (2005) Electronic Journal of Differential Equations (EJDE) [electronic only]
Periodic traveling waves for a nonlocal integro-differential model. Bates, Peter, Chen, Fengxin (1999) Electronic Journal of Differential Equations (EJDE) [electronic only]
Periodic travelling waves V. Hutson, K. Mischaikow (1999) Banach Center Publications Some new techniques for finding periodic travelling waves are discussed.
Periodic wave solutions for the generalized shallow water wave equation by the improved Jacobi elliptic function method. Inc, Mustafa, Ergüt, Mahmut (2005) Applied Mathematics E-Notes [electronic only]
Periodically forced damped beams resting on nonlinear elastic bearings Michal Fečkan (2005) Mathematica Slovaca