@incollection{JEDP_1999____A20_0,
     author = {Sergi\`u Klainerman and Damiano Foschi},
     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 = {https://proceedings.centre-mersenne.org/item/JEDP_1999____A20_0/}
}