@article{MAN_1978__234_163138,
     author = {Karl H. Hofmann and Arunava Mukherjea},
     title = {On the {Density} of the {Image} of the {Exponential} {Function.}},
     journal = {Mathematische Annalen},
     pages = {263--274},
     year = {1978},
     volume = {234},
     zbl = {0382.22005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__234_163138/}
}