@article{PORMA_1967__26_3_115031,
     author = {Tomsky, Judith},
     title = {Decomposition series of a certain semigroup},
     journal = {Portugaliae mathematica},
     pages = {293--298},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1967},
     mrnumber = {0257257},
     zbl = {0223.20069},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_3_115031/}
}