@article{MS2_1987__60_167008,
     author = {S.A. Katre and A.R. Rajwade},
     title = {Resolution of the sign ambiguity in the determination of the cyclotomic numbers of order 4 and the corresponding {Jacobsthal} sum.},
     journal = {Mathematica Scandinavica},
     pages = {52--62},
     publisher = {mathdoc},
     volume = {60},
     year = {1987},
     zbl = {0602.12005},
     url = {http://geodesic.mathdoc.fr/item/MS2_1987__60_167008/}
}