@article{CLTM_1998_1998_1_a17,
     author = {Briales, Emilio and Pis\'on, Pilar and Campillo, Antonio and Mariju\'an, Carlos},
     title = {M\'etodos combinatorios de sicigias para algebras de semigrupos.},
     journal = {Collectanea mathematica},
     pages = {239-256},
     publisher = {mathdoc},
     volume = {49},
     number = {2-3},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1998_1998_1_a17/}
}