@incollection{JEDP_1984____A10_0, author = {Beals, Michael}, title = {Semilinear wave equations with angularly smooth data}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {10}, pages = {1--5}, publisher = {Ecole polytechnique}, year = {1984}, zbl = {0614.35058}, language = {en}, url = {http://archive.numdam.org/item/JEDP_1984____A10_0/} }