@article{CMUC_1999__40_3_a12,
     author = {Costantini, Camillo},
     title = {On a problem of {Nogura} about the product of {Fr\'echet-Urysohn} $\langle \alpha_4\rangle$-spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {537--549},
     publisher = {mathdoc},
     volume = {40},
     number = {3},
     year = {1999},
     mrnumber = {1732482},
     zbl = {1010.54041},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1999__40_3_a12/}
}