@article{10_21136_MB_2008_133941,
     author = {Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s} and N\v{e}mec, Petr},
     title = {Commutative semigroups that are nil of index 2 and have no irreducible elements},
     journal = {Mathematica Bohemica},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {133},
     number = {1},
     year = {2008},
     doi = {10.21136/MB.2008.133941},
     mrnumber = {2400146},
     zbl = {1170.20312},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2008.133941/}
}