@incollection{JEDP_1997____A10_0,
     author = {Klainerman, S. and Machedon, Matei},
     title = {On the regularity properties of non-linear wave equations},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {10},
     pages = {1--8},
     year = {1997},
     publisher = {Ecole polytechnique},
     doi = {10.5802/jedp.522},
     language = {en},
     url = {https://www.numdam.org/articles/10.5802/jedp.522/}
}