TY  - JOUR
AU  - David Frank
TI  - The Signature Defect and the Homotopy of BPL and PL/O
JO  - Commentarii mathematici Helvetici
PY  - 1973
SP  - 525
EP  - 530
VL  - 48
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1973__48_139565/
ID  - CMH_1973__48_139565
ER  -