TY  - JOUR
AU  - Ludwig Bröcker
TI  - Characterization of Fans and Hereditarily Pythagorean Fields.
JO  - Mathematische Zeitschrift
PY  - 1976
SP  - 149
EP  - 164
VL  - 151
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1976__151_172440/
ID  - MZ_1976__151_172440
ER  -