@article{SF_1988__37_1_134924,
     author = {Masashi Katsura},
     title = {Disjunctive splittability of languages.},
     journal = {Semigroup forum},
     pages = {201--214},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1988},
     zbl = {0648.20063},
     url = {http://geodesic.mathdoc.fr/item/SF_1988__37_1_134924/}
}