@article{CRMATH_2009__347_19-20_1177_0,
     author = {Howard, Ben and Millson, John and Snowden, Andrew and Vakil, Ravi},
     title = {The relations among invariants of points on the projective line},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {1177--1182},
     publisher = {Elsevier},
     volume = {347},
     number = {19-20},
     year = {2009},
     doi = {10.1016/j.crma.2009.07.013},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2009.07.013/}
}