@incollection{JEDP_1999____A20_0, author = {Klainerman, Sergi\`u and Foschi, Damiano}, title = {On bilinear estimates for wave equations}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {20}, pages = {1--17}, publisher = {Universit\'e de Nantes}, year = {1999}, zbl = {01810593}, language = {en}, url = {http://www.numdam.org/item/JEDP_1999____A20_0/} }