TY - JOUR AU - Yu. V. Kravchenko TI - On parallel straight lines designated on an $n$-ary group JO - Problemy fiziki, matematiki i tehniki PY - 2012 SP - 54 EP - 57 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PFMT_2012_4_a9/ LA - ru ID - PFMT_2012_4_a9 ER -