@article{10_1017_S2040618500033700,
     author = {Ragab, F. M.},
     title = {Expansion of an {E-function} in a series of products of {E-functions}},
     journal = {Glasgow mathematical journal},
     pages = {194--195},
     year = {1958},
     volume = {2},
     number = {4},
     doi = {10.1017/S2040618500033700},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500033700/}
}