@article{JRAM_1997__487_153919,
     author = {S\'andor J. Kov\'acs},
     title = {On the minimal number of singular fibres in a family of surfaces of general type.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {171--178},
     publisher = {mathdoc},
     volume = {487},
     year = {1997},
     zbl = {0905.14022},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1997__487_153919/}
}