@article{SJL_1962-1963____173_0,
     author = {Strauss, Walter},
     title = {Les op\'erateurs d'onde pour des \'equations d'onde non lin\'eaires ind\'ependantes du temps},
     journal = {S\'eminaire Jean Leray},
     pages = {173--176},
     publisher = {Coll\`ege de France},
     year = {1962-1963},
     language = {fr},
     url = {http://www.numdam.org/item/SJL_1962-1963____173_0/}
}