@article{CMUC_2011__52_3_a11,
     author = {Szymanski, Andrzej},
     title = {On $\pi$-caliber and an application of {Prikry's} partial order},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {463--471},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {2011},
     mrnumber = {2843237},
     zbl = {1249.54011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2011__52_3_a11/}
}