A.D. Elmendorf and J.P. May,
Algebras over equivariant sphere spectra

Abstract. We study algebras over the sphere spectrum S_G of a compact Lie
group G. In particular, we show how to construct S_G-algebras from S-algebras,
where S is the nonequivariant sphere spectrum. This gives a reservoir of
equivariant examples to which recently developed algebraic techniques in
stable homotopy theory can be applied. A special case will be used in a
companion paper of Benson and Greenlees to study the ordinary cohomology
of the classifying space BG.