TY  - JOUR
AU  - Yûkiti Katuta
TI  - Expandability and its generalizations
JO  - Fundamenta Mathematicae
PY  - 1975
SP  - 231
EP  - 250
VL  - 87
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-87-3-231-250/
DO  - 10.4064/fm-87-3-231-250
LA  - en
ID  - 10_4064_fm_87_3_231_250
ER  -