Global solution of the wave equation
Journées équations aux dérivées partielles (1990), article no. 18, 9 p. 
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     author = {Ari Laptev and Yu Safarov},
     title = {Global solution of the wave equation},
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     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {18},
     pages = {1--9},
     publisher = {\'Ecole polytechnique},
     year = {1990},
     zbl = {0719.58041},
     mrnumber = {91j:58161},
     language = {en},
     url = {https://proceedings.centre-mersenne.org/item/JEDP_1990____A18_0/}
}
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Ari Laptev; Yu Safarov. Global solution of the wave equation. Journées équations aux dérivées partielles (1990), article  no. 18, 9 p. https://proceedings.centre-mersenne.org/item/JEDP_1990____A18_0/

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