@article{PSMIR_1976___1_A13_0,
     author = {Persson, Jan},
     title = {The {Cauchy} {Problem} and {Hadamard's} {Example}},
     journal = {Publications des s\'eminaires de math\'ematiques et informatique de Rennes},
     eid = {13},
     pages = {1--3},
     publisher = {D\'epartement de Math\'ematiques et Informatique, Universit\'e de Rennes},
     number = {1},
     year = {1976},
     language = {en},
     url = {http://www.numdam.org/item/PSMIR_1976___1_A13_0/}
}