@article{SF_1975__10_134097,
     author = {G. Thierrin},
     title = {A mode of decomposition of regular languages.},
     journal = {Semigroup forum},
     pages = {32--38},
     publisher = {mathdoc},
     volume = {10},
     year = {1975},
     zbl = {0307.68060},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134097/}
}