@article{16499, author = {{Biasco, Luca and Di Gregorio, Laura}}, issn = {{0003-9527}}, journal = {{Archive for Rational Mechanics and Analysis}}, pages = {{303--362}}, title = {{{A Birkhoff–Lewis Type Theorem for the Nonlinear Wave Equation}}}, doi = {{10.1007/s00205-009-0240-y}}, year = {{2009}}, } @article{16634, author = {{Melbourne, Ian and Dellnitz, Michael and Golubitsky, Martin}}, issn = {{0003-9527}}, journal = {{Archive for Rational Mechanics and Analysis}}, pages = {{75--98}}, title = {{{The structure of symmetric attractors}}}, doi = {{10.1007/bf00386369}}, year = {{1993}}, }