@article{PFMT_2012_4_a9,
     author = {Yu. V. Kravchenko},
     title = {On parallel straight lines designated on an $n$-ary group},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {54--57},
     publisher = {mathdoc},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2012_4_a9/}
}