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@article{SF_1983__26_134614, author = {J.C. Spehner}, title = {Sur la classification syntaxique.}, journal = {Semigroup forum}, pages = {323--348}, publisher = {mathdoc}, volume = {26}, year = {1983}, zbl = {0514.20052}, url = {http://geodesic.mathdoc.fr/item/SF_1983__26_134614/} }
J.C. Spehner. Sur la classification syntaxique.. Semigroup forum, Tome 26 (1983), pp. 323-348. http://geodesic.mathdoc.fr/item/SF_1983__26_134614/