@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}, year = {1987}, pages = {1-9}, zbl = {0655.35057}, language = {en}, url = {http://dml.mathdoc.fr/item/JEDP_1987____A1_0} }
Hörmander, Lars. Remarks on the Klein-Gordon equation. Journées équations aux dérivées partielles, (1987), pp. 1-9. http://gdmltest.u-ga.fr/item/JEDP_1987____A1_0/
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