@article{ITA_1980__14_1_39_0, author = {De Luca, Aldo}, title = {On some properties of the syntactic semigroup of a very pure subsemigroup}, journal = {RAIRO. Informatique th\'eorique}, pages = {39--56}, publisher = {EDP-Sciences}, volume = {14}, number = {1}, year = {1980}, zbl = {0437.20053}, mrnumber = {570037}, language = {en}, url = {http://www.numdam.org/item/ITA_1980__14_1_39_0/} }