TY  - JOUR
AU  - J. Hickman
TI  - A problem on series of ordinals
JO  - Fundamenta Mathematicae
PY  - 1973
SP  - 49
EP  - 56
VL  - 81
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-81-1-49-56/
DO  - 10.4064/fm-81-1-49-56
LA  - en
ID  - 10_4064_fm_81_1_49_56
ER  -