@article{SJ_1960-1961__4__A8_0,
     author = {Leray, Jean},
     title = {Particules et singularit\'es des ondes},
     journal = {S\'eminaire Janet. M\'ecanique analytique et m\'ecanique c\'eleste},
     note = {talk:8},
     pages = {1--13},
     publisher = {Secr\'etariat math\'ematique},
     volume = {4},
     year = {1960-1961},
     zbl = {0106.42502},
     language = {fr},
     url = {http://www.numdam.org/item/SJ_1960-1961__4__A8_0/}
}