@article{BUMI_2006_8_9B_2_a4,
     author = {Sabatino, Pietro},
     title = {On the projective genus of surfaces},
     journal = {Bollettino della Unione matematica italiana},
     pages = {311--317},
     publisher = {mathdoc},
     volume = {Ser. 8, 9B},
     number = {2},
     year = {2006},
     zbl = {1178.14037},
     mrnumber = {2233140},
     language = {it},
     url = {https://geodesic-test.mathdoc.fr/item/BUMI_2006_8_9B_2_a4/}
}