@article{PIM_2002_N_S_72_86_a0,
     author = {Saharon Shelah and Zoran Spasojevi\'c},
     title = {Cardinal {Invariants} {Bk} and {Tk}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {1 },
     publisher = {mathdoc},
     volume = {_N_S_72},
     number = {86},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_2002_N_S_72_86_a0/}
}