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@article{CMJ_2004__54_1_a21, author = {Shum, K. P. and Ren, X. M.}, title = {On super hamiltonian semigroups}, journal = {Czechoslovak Mathematical Journal}, pages = {247--252}, publisher = {mathdoc}, volume = {54}, number = {1}, year = {2004}, mrnumber = {2040236}, zbl = {1051.20024}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMJ_2004__54_1_a21/} }
Shum, K. P.; Ren, X. M. On super hamiltonian semigroups. Czechoslovak Mathematical Journal, Tome 54 (2004) no. 1, pp. 247-252. http://geodesic.mathdoc.fr/item/CMJ_2004__54_1_a21/