@article{2788,
author = {Haruki, Hiroshi},
title = {A functional equation connected with the sine addition theorem},
journal = {Portugaliae mathematica},
volume = {35},
year = {1976},
pages = {75-79},
zbl = {0415.39003},
mrnumber = {0442527},
language = {en},
url = {http://dml.mathdoc.fr/item/2788}
}
Haruki, Hiroshi. A functional equation connected with the sine addition theorem. Portugaliae mathematica, Tome 35 (1976) pp. 75-79. http://gdmltest.u-ga.fr/item/2788/