@article{JRAM_1992__433_153472,
     author = {Emilia Mezzetti},
     title = {The border cases of the lifting theorem for surfaces in {P4.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {101--112},
     publisher = {mathdoc},
     volume = {433},
     year = {1992},
     zbl = {0753.14037},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1992__433_153472/}
}