1. H. Bass, Algebraic K-Theory, Springer-Verlag (1973).
2. H. Bass, ?Liberation des modules projectifs sur certains anneaux de polynomes,? in: Lect. Notes Math., Vol. 431, Springer-Verlag, New York (1975), pp. 228?254.
3. L. N. Vasershtein, ?K1-theory and the congruence subgroup problem,? Mat. Zametki,5, No. 2, 233?244 (1969).
4. L. N. Vasershtein, ?Stable rank of rings and dimension of topological spaces,? Funkts. Anal. Prilozhen.,5, No. 2, 17?27 (1971).
5. L. N. Vasershtein and A. A. Suslin, ?Serre's problem on projective modules over polynomial rings and algebraic K-theory,? Funkts. Anal. Prilozhen.,8, No. 2, 65?67 (1974).