TY  - JOUR
AU  - G. C. Nelson
TI  - A further restricted ω-rule
JO  - Colloquium Mathematicum
PY  - 1971
SP  - 1
EP  - 3
VL  - 23
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-23-1-1-3/
DO  - 10.4064/cm-23-1-1-3
LA  - en
ID  - 10_4064_cm_23_1_1_3
ER  -