@article{BSMF_1963__91__203_0,
     author = {Zerner, M.},
     title = {Solutions singuli\`eres d'\'equations aux d\'eriv\'ees partielles},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {203--226},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {91},
     year = {1963},
     doi = {10.24033/bsmf.1595},
     mrnumber = {29 #6150},
     zbl = {0196.39001},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1595/}
}