@article{MZ_1959__71_169802,
     author = {T.M. MacRobert},
     title = {Infinite {Series} of {E-Functions.}},
     journal = {Mathematische Zeitschrift},
     pages = {143--145},
     publisher = {mathdoc},
     volume = {71},
     year = {1959},
     zbl = {0085.29101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1959__71_169802/}
}