@article{10_4064_ba54_3_1,
     author = {Igor E. Shparlinski},
     title = {Primitive {Points} on a {Modular} {Hyperbola}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {193--200},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {2006},
     doi = {10.4064/ba54-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba54-3-1/}
}