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@article{SF_1997__54_2_135517, author = {R. Korkmaz}, title = {On the closure of {B2} ( ...,...).}, journal = {Semigroup forum}, pages = {166--174}, publisher = {mathdoc}, volume = {54}, number = {2}, year = {1997}, zbl = {0864.22001}, url = {http://geodesic.mathdoc.fr/item/SF_1997__54_2_135517/} }
R. Korkmaz. On the closure of B2 ( ...,...).. Semigroup forum, Tome 54 (1997) no. 2, pp. 166-174. http://geodesic.mathdoc.fr/item/SF_1997__54_2_135517/