@article{IM_1986__84_143346,
     author = {J. Harris},
     title = {On the {Severi} problem.},
     journal = {Inventiones mathematicae},
     pages = {445--462},
     publisher = {mathdoc},
     volume = {84},
     year = {1986},
     zbl = {0596.14017},
     url = {http://geodesic.mathdoc.fr/item/IM_1986__84_143346/}
}