TY  - JOUR
AU  - Folke Eriksson
TI  - The Relation Between Two Generalisations of the Notion 
JO  - Mathematica Scandinavica
PY  - 1960
SP  - 339
EP  - 355
VL  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1960__8_165756/
ID  - MS2_1960__8_165756
ER  -