@article{GDZPPN002359197,
title = {Resolution of the sign ambiguity in the determination of the cyclotomic numbers of order 4 and the corresponding Jacobsthal sum.},
journal = {Mathematica Scandinavica},
volume = {61},
year = {1987},
pages = {52-62},
zbl = {0602.12005},
url = {http://dml.mathdoc.fr/item/GDZPPN002359197}
}
Katre, S.A.; Rajwade, A.R. Resolution of the sign ambiguity in the determination of the cyclotomic numbers of order 4 and the corresponding Jacobsthal sum.. Mathematica Scandinavica, Tome 61 (1987) pp. 52-62. http://gdmltest.u-ga.fr/item/GDZPPN002359197/