@article{DAN_1960_134_2_a6,
     author = {A. H. Livshits},
     title = {Direct decompositions of idempotents in semigroups},
     journal = {Doklady Akademii Nauk},
     pages = {271--274},
     year = {1960},
     volume = {134},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_134_2_a6/}
}