@article{SF_1981__23_134522,
     author = {L. Satko and O. Grosek},
     title = {On minimal {A-ideals} of semigroups.},
     journal = {Semigroup forum},
     pages = {283--296},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     zbl = {0477.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1981__23_134522/}
}