@article{10_1090_S0894_0347_01_00384_8,
     author = {Gibney, Angela and Keel, Sean and Morrison, Ian},
     title = {Towards the ample cone of \overline{{\dh}‘€}_{{\dh}‘”,{\dh}‘›}},
     journal = {Journal of the American Mathematical Society},
     pages = {273--294},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2002},
     doi = {10.1090/S0894-0347-01-00384-8},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-01-00384-8/}
}