@article{GDZPPN002081016,
title = {Die Eulersche Formel cos ... + i ...sin ... = ei...},
journal = {Elemente der Mathematik},
volume = {39},
year = {1984},
pages = {47-47},
zbl = {0535.30001},
url = {http://dml.mathdoc.fr/item/GDZPPN002081016}
}
Laugwitz, D. Die Eulersche Formel cos ... + i ...sin ... = ei.... Elemente der Mathematik, Tome 39 (1984) p. 47. http://gdmltest.u-ga.fr/item/GDZPPN002081016/