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@article{MAN_1890__36_157495, author = {Hammond}, title = {A simple {Proof} of the {Existence} of {Irreducible} {Invariants} of {Degrees} 20 and 30 for the {Binary} {Seventhic}}, journal = {Mathematische Annalen}, pages = {255--261}, publisher = {mathdoc}, volume = {36}, year = {1890}, zbl = {22.0146.02}, url = {http://geodesic.mathdoc.fr/item/MAN_1890__36_157495/} }
Hammond. A simple Proof of the Existence of Irreducible Invariants of Degrees 20 and 30 for the Binary Seventhic. Mathematische Annalen, Tome 36 (1890), pp. 255-261. http://geodesic.mathdoc.fr/item/MAN_1890__36_157495/