Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1921__82_158852, author = {E. Trefftz}, title = {Zur {Prandtlschen} {Tragfl\"achentheorie}}, journal = {Mathematische Annalen}, pages = {306--319}, publisher = {mathdoc}, volume = {82}, year = {1921}, zbl = {48.0971.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1921__82_158852/} }
E. Trefftz. Zur Prandtlschen Tragflächentheorie. Mathematische Annalen, Tome 82 (1921), pp. 306-319. http://geodesic.mathdoc.fr/item/MAN_1921__82_158852/