Esquivel-Avila, Jorge A.: Remarks on the qualitative behavior of the undamped Klein-Gordon equation.
(English).
In:
Mikula, Karol (ed.): Proceedings of Equadiff 14.
Conference on Differential Equations and Their Applications, Bratislava, July 24-28, 2017.
Slovak University of Technology in Bratislava, SPEKTRUM STU Publishing, Bratislava, 2017.
pp. 221-228