Media type: E-Article Title: Perron-Frobenius operators and the Klein-Gordon equation Contributor: Canto-Martín, Francisco; Hedenmalm, Haakan; Montes-Rodríguez, Alfonso Published: European Mathematical Society - EMS - Publishing House GmbH, 2013 Published in: Journal of the European Mathematical Society, 16 (2013) 1, Seite 31-66 Language: Not determined DOI: 10.4171/jems/427 ISSN: 1435-9855; 1435-9863 Origination: Footnote: