@article{CMUC_2007__48_4_a12,
     author = {Garc{\'\i}a-Ferreira, S. and Szeptycki, P. J.},
     title = {MAD families and $P$-points},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {699--705},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {2007},
     mrnumber = {2375170},
     zbl = {1199.03028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2007__48_4_a12/}
}