@article{10_4171_dm_266,
     author = {Ajay C. Ramadoss},
     title = {On the nonexistence of certain morphisms from {Grassmannian} to {Grassmannian} in characteristic $0$},
     journal = {Documenta mathematica},
     pages = {67--113},
     year = {2009},
     volume = {14},
     doi = {10.4171/dm/266},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/266/}
}