@article{IM_1992__110_2_144051,
     author = {Jos\'e Felipe Voloch and Robert F. Coleman},
     title = {Companion forms and {Kodaira-Spencer} theory.},
     journal = {Inventiones mathematicae},
     pages = {263--282},
     publisher = {mathdoc},
     volume = {110},
     number = {2},
     year = {1992},
     zbl = {0770.11024},
     url = {http://geodesic.mathdoc.fr/item/IM_1992__110_2_144051/}
}