TY  - JOUR
AU  - Brown, Lawrence G.
AU  - Lee, Hyun Ho
TI  - Homotopy Classification of Projections in the Corona Algebra of a Non-simple C*-algebra
JO  - Canadian journal of mathematics
PY  - 2012
SP  - 755
EP  - 777
VL  - 64
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-2011-092-x/
DO  - 10.4153/CJM-2011-092-x
ID  - 10_4153_CJM_2011_092_x
ER  -