@article{SEDP_1993-1994____A14_0,
     author = {Kondratiev, V. A. and Egorov, Yu. V.},
     title = {On a {Lagrange} problem and its generalizations},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:13},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1993-1994},
     language = {en},
     url = {http://archive.numdam.org/item/SEDP_1993-1994____A14_0/}
}