@article{CMUC_1996_37_3_a13,
     author = {Arhangel'skii, A. V. and Bella, A.},
     title = {Countable fan-tightness versus countable tightness},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {565--576},
     year = {1996},
     volume = {37},
     number = {3},
     mrnumber = {1426921},
     zbl = {0881.54005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1996_37_3_a13/}
}