@article{IM_1974__24_142272,
     author = {Frans Oort},
     title = {Subvarieties of {Moduli} {Spaces.}},
     journal = {Inventiones mathematicae},
     pages = {95--120},
     publisher = {mathdoc},
     volume = {24},
     year = {1974},
     zbl = {0259.14011},
     url = {http://geodesic.mathdoc.fr/item/IM_1974__24_142272/}
}