@article{MM2_1994__85_3-4_156016,
     author = {Dave Benson},
     title = {Conway's {Group} {CO3} and the {Dickson} {Invariants.}},
     journal = {Manuscripta mathematica},
     pages = {177--194},
     publisher = {mathdoc},
     volume = {85},
     number = {3-4},
     year = {1994},
     zbl = {0853.55018},
     url = {http://geodesic.mathdoc.fr/item/MM2_1994__85_3-4_156016/}
}