@article{1183496974,
author = {Langer, R. E.},
title = {An inverse problem in differential equations},
journal = {Bull. Amer. Math. Soc.},
volume = {39},
number = {12},
year = {1933},
pages = { 814-820},
language = {en},
url = {http://dml.mathdoc.fr/item/1183496974}
}
Langer, R. E. An inverse problem in differential equations. Bull. Amer. Math. Soc., Tome 39 (1933) no. 12, pp. 814-820. http://gdmltest.u-ga.fr/item/1183496974/