@article{CMUC_1988__29_4_a16,
     author = {Juh\'asz, Istv\'an},
     title = {A weakening of $\clubsuit$, with applications to topology},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {767--773},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {1988},
     mrnumber = {982796},
     zbl = {0676.54005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1988__29_4_a16/}
}