@article{MASLO_1994__44_5_a8,
     author = {Williams, Kenneth S. and Nan-Yue, Zhang},
     title = {Evaluation of two trigonometric sums},
     journal = {Mathematica slovaca},
     pages = {575--583},
     publisher = {mathdoc},
     volume = {44},
     number = {5},
     year = {1994},
     mrnumber = {1338430},
     zbl = {0820.11010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1994__44_5_a8/}
}