The Yagita invariant of general linear groups 

H. H. Glover, I. J. Leary and C. B. Thomas

Abstract 
We give a definition of the Yagita invariant at a prime p of an
arbitrary group G, and compute the invariant for each prime for the
general linear groups over any integrally closed subring of the
complex numbers. We also compute the invariants for special linear
groups over the same rings, except in some cases when both the degree
of the linear group and the ring are `small' compared to p.  

Proceedings of the 1994 Barcelona Conference on Algebraic Topology,
Progress in Mathematics 136, Birkhaeuser (1996) 185-192.