TY  - JOUR
AU  - Costantini, Camillo
TI  - On a problem of Nogura about the product of Fréchet-Urysohn $\langle \alpha_4\rangle$-spaces
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1999
SP  - 537
EP  - 549
VL  - 40
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1999__40_3_a12/
LA  - en
ID  - CMUC_1999__40_3_a12
ER  -