@article{SF_1984__28_134650,
     author = {J. Almeida},
     title = {Some algorithms on the star operation applied to finite languages.},
     journal = {Semigroup forum},
     pages = {187--198},
     publisher = {mathdoc},
     volume = {28},
     year = {1984},
     zbl = {0541.20044},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__28_134650/}
}