@article{DM_2007_19_1_a9,
     author = {T. G. Petrosyan},
     title = {An upper bound for the number of product-free sets in a~class of groups},
     journal = {Diskretnaya Matematika},
     pages = {76--88},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2007_19_1_a9/}
}