@article{DOCMA_2016__21__a26,
     author = {O'Grady, Kieran G.},
     title = {Decomposable cycles and {Noether-Lefschetz} loci},
     journal = {Documenta mathematica},
     pages = {661--687},
     publisher = {mathdoc},
     volume = {21},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2016__21__a26/}
}