@article{DM_2013_25_1_a10,
     author = {V. G. Sargsyan},
     title = {The number of differences in groups of prime order},
     journal = {Diskretnaya Matematika},
     pages = {152--158},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2013_25_1_a10/}
}