TY  - JOUR
AU  - J. W. Addison
TI  - Separation principles in the hierarchies of classical and effective descriptive set theory
JO  - Fundamenta Mathematicae
PY  - 1958
SP  - 123
EP  - 135
VL  - 46
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-46-2-123-135/
DO  - 10.4064/fm-46-2-123-135
LA  - en
ID  - 10_4064_fm_46_2_123_135
ER  -