Remark on periodic solutions of a linear wave equation in one dimension
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Břetislav Novák (1974)
Commentationes Mathematicae Universitatis Carolinae
de Menezes, S.B. (2006)
International Journal of Mathematics and Mathematical Sciences
Sergei B. Kuksin (2013/2014)
Séminaire Laurent Schwartz — EDP et applications
T. Kappeler, B. Schaad, P. Topalov (2011/2012)
Séminaire Laurent Schwartz — EDP et applications
Schechter, Martin (1998)
Abstract and Applied Analysis
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