@article{MV_1974_26_1_a16,
     author = {S. Lajos},
     title = {On semigroups that are semilattices of  left groups},
     journal = {Matemati\v{c}ki vesnik},
     pages = {125 },
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/MV_1974_26_1_a16/}
}