@article{AMLG_1980__20_137959,
     author = {G. Longo and M. Venturini Zilli},
     title = {A ...-calculus with an algorithmic ... .},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {41--52},
     publisher = {mathdoc},
     volume = {20},
     year = {1980},
     zbl = {0432.03011},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1980__20_137959/}
}