@article{ITA_1983__17_1_71_0,
     author = {Margaria, I. and Zacchi, M.},
     title = {Right and left invertibility in $\lambda - \beta $-calculus},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {71--88},
     publisher = {EDP-Sciences},
     volume = {17},
     number = {1},
     year = {1983},
     mrnumber = {701989},
     zbl = {0523.03010},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1983__17_1_71_0/}
}