# 1 joint paper of Ryszard Frankiewicz with Shelah

FShZ:396 1993-08-27 [pdf] [ps] [abstract] [arXiv:math.LO/9303207]
Frankiewicz+Shelah+Zbierski, On closed $P$-sets with ccc in the space $\omega ^*$ -- J Symbolic Logic 58 (1993) 1171-1176