The cosine functional equation for nilpotent groups. (Short Communication).
Aequationes mathematicae, Tome 14 (1976), p. 511
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ZblIlie Corovei. The cosine functional equation for nilpotent groups. (Short Communication).. Aequationes mathematicae, Tome 14 (1976), p. 511. http://geodesic.mathdoc.fr/item/AM2_1976__14_136619/
@article{AM2_1976__14_136619,
author = {Ilie Corovei},
title = {The cosine functional equation for nilpotent groups. {(Short} {Communication).}},
journal = {Aequationes mathematicae},
pages = {511--511},
year = {1976},
volume = {14},
zbl = {0348.39004},
url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136619/}
}