Quillen's work on the Atiyah-Swan Conjecture These notes, dating from about 1990 but substantially expanded and revised in 2011, give an exposition of Quillen's landmark papers "On the spectrum of an equivariant cohomology ring I,II.
The K-theory of finite fieldsThese notes also date from ancient times. They give an exposition of Quillen's work on the cohomology and K-theory of general linear groups over a finite field.