@article{10_21136_MB_1993_126156,
     author = {Fabrici, Imrich},
     title = {One-sided principal ideals in the direct product of two semigroups},
     journal = {Mathematica Bohemica},
     pages = {337--342},
     publisher = {mathdoc},
     volume = {118},
     number = {4},
     year = {1993},
     doi = {10.21136/MB.1993.126156},
     mrnumber = {1251880},
     zbl = {0810.20043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1993.126156/}
}