@article{ITA_1996__30_4_349_0,
     author = {Silva, Pedro V.},
     title = {On free inverse monoid languages},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {349--378},
     publisher = {EDP-Sciences},
     volume = {30},
     number = {4},
     year = {1996},
     mrnumber = {1427939},
     zbl = {0867.68074},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1996__30_4_349_0/}
}