@article{CMUC_1996__37_4_a17,
     author = {Farah, Ilijas},
     title = {OCA and towers in $\Cal P(\Bbb N)/fin$},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {861--866},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {1996},
     mrnumber = {1440716},
     zbl = {0887.03037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1996__37_4_a17/}
}