Topological Methods in Nonlinear Analysis publishes research and survey papers on a wide range of nonlinear analysis, giving preference to those which employ topological methods.
Second Noether-type theorem for the generalized variational principle of Herglotz
Bogdana Georgieva, et al. (2005)
Periodic solutions of ordinary differential equations with bounded nonlinearities
James Robert Ward, Jr.. (2002)