@incollection{JEDP_1990____A18_0, author = {Ari Laptev and Yu Safarov}, title = {Global solution of the wave equation}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {18}, pages = {1--9}, publisher = {\'Ecole polytechnique}, year = {1990}, doi = {10.5802/jedp.400}, mrnumber = {91j:58161}, zbl = {0719.58041}, language = {en}, url = {https://proceedings.centre-mersenne.org/articles/10.5802/jedp.400/} }