@article{AIHPA_1967__7_3_249_0,
     author = {Toure, Saliou},
     title = {G\'en\'eralisation de l'\'equation int\'egrale {d'Ambarzumian}},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {249--255},
     publisher = {Gauthier-Villars},
     volume = {7},
     number = {3},
     year = {1967},
     mrnumber = {219298},
     zbl = {0155.17801},
     language = {fr},
     url = {http://www.numdam.org/item/AIHPA_1967__7_3_249_0/}
}