@article{CMH_1981__56_251496,
     author = {Maurizio Cornalba and Enrico Arbarello},
     title = {Addendum 7.1.1981. {Correzione} a },
     journal = {Commentarii mathematici Helvetici},
     pages = {38--38},
     publisher = {mathdoc},
     volume = {56},
     year = {1981},
     zbl = {0505.14002},
     url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_251496/}
}