Remarks on the Klein-Gordon equation
Journées équations aux dérivées partielles, (1987), article no. 1, 9 p.
@article{JEDP_1987____A1_0,
     author = {H\"ormander, Lars},
     title = {Remarks on the Klein-Gordon equation},
     journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     publisher = {Ecole polytechnique},
     year = {1987},
     zbl = {0655.35057},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1987____A1_0}
}
Hörmander, Lars. Remarks on the Klein-Gordon equation. Journées équations aux dérivées partielles,  (1987), article  no. 1, 9 p. http://www.numdam.org/item/JEDP_1987____A1_0/

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