@article{IM_1993__111_1_144090,
     author = {Robert MacPherson and Mark McConnell},
     title = {Explicit reduction theory for {Siegel} modular threefolds.},
     journal = {Inventiones mathematicae},
     pages = {575--626},
     publisher = {mathdoc},
     volume = {111},
     number = {1},
     year = {1993},
     zbl = {0789.11029},
     url = {http://geodesic.mathdoc.fr/item/IM_1993__111_1_144090/}
}