@article{VTGU_2015_6_a5,
     author = {D. V. Sergeeva},
     title = {Left-invariant measures on topological $n$-ary subsemigroup of binary groups},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {50--55},
     year = {2015},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2015_6_a5/}
}