@article{IM_1984__76_143115,
     author = {Z. Ran and M.-C. Chang},
     title = {Unirationality of the moduli spaces of curves of genus 11, 13 (and 12).},
     journal = {Inventiones mathematicae},
     pages = {41--54},
     publisher = {mathdoc},
     volume = {76},
     year = {1984},
     zbl = {0541.14025},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__76_143115/}
}