Voir la notice de l'article provenant de la source Math-Net.Ru
@article{SEMR_2011_8_a16, author = {D. V. Solomatin}, title = {Semigroups with outerplanar {Cayley} graphs}, journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a}, pages = {191--212}, publisher = {mathdoc}, volume = {8}, year = {2011}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/SEMR_2011_8_a16/} }
D. V. Solomatin. Semigroups with outerplanar Cayley graphs. Sibirskie èlektronnye matematičeskie izvestiâ, Tome 8 (2011), pp. 191-212. http://geodesic.mathdoc.fr/item/SEMR_2011_8_a16/