@article{10_4064_cm_21_2_187_189,
     author = {S. Lajos},
     title = {A characterization of semigroups which are semilattices of groups},
     journal = {Colloquium Mathematicum},
     pages = {187--189},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1970},
     doi = {10.4064/cm-21-2-187-189},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-21-2-187-189/}
}