@article{MAN_1962__148_160988,
     author = {F.M. RAGAB},
     title = {Infinite {Series} of {E-functions.}},
     journal = {Mathematische Annalen},
     pages = {94--97},
     publisher = {mathdoc},
     volume = {148},
     year = {1962},
     zbl = {0101.29404},
     url = {http://geodesic.mathdoc.fr/item/MAN_1962__148_160988/}
}