TY - JOUR AU - Cuntz, Joachim AU - Quillen, Daniel TI - Algebra extensions and nonsingularity JO - Journal of the American Mathematical Society PY - 1995 SP - 251 EP - 289 VL - 08 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1995-1303029-0/ DO - 10.1090/S0894-0347-1995-1303029-0 ID - 10_1090_S0894_0347_1995_1303029_0 ER -