@article{SEDP_1982-1983____A1_0,
     author = {Beals, R.},
     title = {Probl\`emes inverses pour des \'equations diff\'erentielles sur la droite},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:1},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1982-1983},
     mrnumber = {716889},
     zbl = {0532.34017},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1982-1983____A1_0/}
}