@article{VMUMM_1986_3_a2,
     author = {L. A. Skornyakov},
     title = {Injectivity of all ordered left polygons over a monoid},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {17--19},
     publisher = {mathdoc},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1986_3_a2/}
}