Euler Characteristics of Groups: The p-Fractional Part. Kenneth S. Brown — 1975 Inventiones mathematicae
Euler Characteristics of Discrete Groups and G-Spaces. Kenneth S. Brown — 1974 Inventiones mathematicae
Cohomology with free coefficients of the fundamental group of a graph of groups. Kenneth S. Brown; Ross Geoghegan — 1985 Commentarii mathematici Helvetici
An infinite-dimensional torsion-free FP...group. Kenneth S. Brown; R. Geoghegan — 1984 Inventiones mathematicae