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@article{SF_1980__20_134405, author = {S. Subbiah and K.D. jr. Magill}, title = {Another semigroup characterization of the simple closed curve.}, journal = {Semigroup forum}, pages = {89--90}, publisher = {mathdoc}, volume = {20}, year = {1980}, zbl = {0437.54029}, url = {http://geodesic.mathdoc.fr/item/SF_1980__20_134405/} }
S. Subbiah; K.D. jr. Magill. Another semigroup characterization of the simple closed curve.. Semigroup forum, Tome 20 (1980), pp. 89-90. http://geodesic.mathdoc.fr/item/SF_1980__20_134405/