@article{ITA_1997__31_5_483_0,
     author = {Pucella, R. R.},
     title = {An analysis of {Lambek's} production machines},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {483--497},
     publisher = {EDP-Sciences},
     volume = {31},
     number = {5},
     year = {1997},
     mrnumber = {1611663},
     zbl = {0893.68093},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1997__31_5_483_0/}
}