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@article{SF_1996__53_2_135501, author = {J.B. Stephen}, title = {The automorphism group of the graph of an {R} class.}, journal = {Semigroup forum}, pages = {387--389}, publisher = {mathdoc}, volume = {53}, number = {2}, year = {1996}, zbl = {0861.20057}, url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135501/} }
J.B. Stephen. The automorphism group of the graph of an R class.. Semigroup forum, Tome 53 (1996) no. 2, pp. 387-389. http://geodesic.mathdoc.fr/item/SF_1996__53_2_135501/