(t2 - t)-Reciprocities on the Affine Line and Matsumoto's Theorem. Frans Keune — 1975 Inventiones mathematicae
Multirelative K -theory and axioms for the K -theory of rings. Keune, Frans — 1996 Documenta Mathematica
On the equivalence of Quillen's and Swan's K -theories. Ebeling, Paul; Keune, Frans — 2002 Georgian Mathematical Journal