1. Coincidences, roots and fixed points;Brooks,1967
2. Certain subgroups of the fundamental group and the number of roots of ƒ(x) = a;Brooks;Amer. J. Math.,1973
3. On the sharpness of the Δ2 and Δ1 Nielsen numbers;Brooks;J. Reine Angew. Math.,1973
4. Nielsen numbers for roots of maps of aspherical manifolds;Brooks;Pacific J. Math.,1995
5. R. Brown, A middle-distance look at root theory, Preprint.