@article{10_4064_cm_80_2_297_307,
     author = {Murray Bell},
     title = {Tightness and \ensuremath{\pi}-character in centered spaces},
     journal = {Colloquium Mathematicum},
     pages = {297--307},
     publisher = {mathdoc},
     volume = {80},
     number = {2},
     year = {1999},
     doi = {10.4064/cm-80-2-297-307},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-80-2-297-307/}
}