@article{PIM_1952_S_S_IV_04_a4,
     author = {I. I. Hirschman Jr. and D. V. Widder},
     title = {A {Note} {On} {Quasi-Analytic} {Functions}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {57 },
     publisher = {mathdoc},
     volume = {_S_S_IV},
     number = {04},
     year = {1952},
     url = {http://geodesic.mathdoc.fr/item/PIM_1952_S_S_IV_04_a4/}
}