Localization and wave fronts
Séminaire Équations aux dérivées partielles (Polytechnique) dit aussi "Séminaire Goulaouic-Schwartz" (1972-1973), Exposé no. 25, 10 p. 
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     author = {Andersson, K. G.},
     title = {Localization and wave fronts},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:25},
     pages = {1--10},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1972-1973},
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     zbl = {0263.35006},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1972-1973____A26_0/}
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Andersson, K. G. Localization and wave fronts. Séminaire Équations aux dérivées partielles (Polytechnique) dit aussi "Séminaire Goulaouic-Schwartz" (1972-1973), Exposé no. 25, 10 p. http://www.numdam.org/item/SEDP_1972-1973____A26_0/

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