@article{10_4171_dm_453,
     author = {Margarida Melo and Filippo Viviani},
     title = {The {Picard} group of the compactified universal {Jacobian}},
     journal = {Documenta mathematica},
     pages = {457--507},
     year = {2014},
     volume = {19},
     doi = {10.4171/dm/453},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/453/}
}