@article{1183506034, author = {Hadamard, J.}, title = {A known problem of geometry and its cases of indetermination}, journal = {Bull. Amer. Math. Soc.}, volume = {50}, number = {12}, year = {1944}, pages = { 520-528}, language = {en}, url = {http://dml.mathdoc.fr/item/1183506034} }
Hadamard, J. A known problem of geometry and its cases of indetermination. Bull. Amer. Math. Soc., Tome 50 (1944) no. 12, pp. 520-528. http://gdmltest.u-ga.fr/item/1183506034/