1. H.E.A. Campbell and I.P. Hughes, On the vector invariants of U2(FP): a proof of a conjecture of David Richman, Adv. in Math., to appear.
2. H.E.A. Campbell and I.P. Hughes, Rings of invariants of certain p-groups over the field FP, J. Algebra, submitted.
3. H.E.A. Campbell and I.P. Hughes, Upper triangular invariants as modules over the Dickson invariants, Math. Ann., to appear.
4. Vector invariants of symmetric groups;Campbell;Canad. Math. Bull.,1990
5. Rings of invariants and p-Sylow subgroups;Campbell;Canad. Math. Bull.,1991