TY  - JOUR
AU  - Lembcke, Jörn
TI  - A set function without $\sigma$-additive extension having finitely additive extensions arbitrarily close to $\sigma$-additivity
JO  - Czechoslovak Mathematical Journal
PY  - 1980
SP  - 376
EP  - 381
VL  - 30
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1980.101688/
DO  - 10.21136/CMJ.1980.101688
LA  - en
ID  - 10_21136_CMJ_1980_101688
ER  -