@article{10_21136_CMJ_1989_102324,
     author = {Miccoli, Maria Maddalena and Pond\v{e}l{\'\i}\v{c}ek, Bed\v{r}ich},
     title = {On $\alpha$-ideals and generalized $\alpha$-ideals in semigroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {522--527},
     publisher = {mathdoc},
     volume = {39},
     number = {3},
     year = {1989},
     doi = {10.21136/CMJ.1989.102324},
     mrnumber = {1006318},
     zbl = {0684.20053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102324/}
}