Relative Algebraic K-Theory. An Appendix to the Paper of K.R.Coombes and V. Srinivas. K.R. Coombes (1982/1983) Inventiones mathematicae
Relative K-Theory and Vector Bundles on Certain Singular Varieties. K.R. Coombes, V. Srinivas (1982/1983) Inventiones mathematicae