The cosine functional equation for groups
Matematički vesnik, Tome 21 (1969) no. 3, p. 339
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Classification :
39B52
R. Dacić. The cosine functional equation for groups. Matematički vesnik, Tome 21 (1969) no. 3, p. 339 . http://geodesic.mathdoc.fr/item/MV_1969_21_3_a12/
@article{MV_1969_21_3_a12,
author = {R. Daci\'c},
title = {The cosine functional equation for groups},
journal = {Matemati\v{c}ki vesnik},
pages = {339 },
year = {1969},
volume = {21},
number = {3},
url = {http://geodesic.mathdoc.fr/item/MV_1969_21_3_a12/}
}