TY  - JOUR
AU  - Anderson, Tim
AU  - Kleinfeld, Erwin
TI  - A Classification of 2-Varieties
JO  - Canadian journal of mathematics
PY  - 1976
SP  - 348
EP  - 364
VL  - 28
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-037-2/
DO  - 10.4153/CJM-1976-037-2
ID  - 10_4153_CJM_1976_037_2
ER  -