@article{CMH_1986__61_140066,
     author = {Israel Vainsencher and Daniel F. Coray},
     title = {Enumerative formulae for ruled cubic surfaces and rational quintic curves.},
     journal = {Commentarii mathematici Helvetici},
     pages = {501--518},
     publisher = {mathdoc},
     volume = {61},
     year = {1986},
     zbl = {0602.14049},
     url = {http://geodesic.mathdoc.fr/item/CMH_1986__61_140066/}
}