@article{SEDP_1972-1973____A24_0,
     author = {Alinhac, S.},
     title = {Un op\'erateur diff\'erentiel dans $\mathbb {R}^3$ au comportement surprenant (d{\textquoteright}apr\`es {A.} {Andreotti} et {C.} {D.} {Hill)}},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:23},
     pages = {1--8},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1972-1973},
     mrnumber = {393875},
     zbl = {0263.35078},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1972-1973____A24_0/}
}