Joint papers of Koppelberg and Shelah

KpSh:415 1994-04-12 [pdf] [ps] [abstract] [arXiv:math.LO/9404226]
Koppelberg+Shelah, Densities of ultraproducts of Boolean algebras -- Canadian J Math Journal Canadien de Mathematiques 47 (1995) 132-145
KpSh:504 1997-01-09 [pdf] [ps] [abstract] [arXiv:math.LO/9610227]
Koppelberg+Shelah, Subalgebras of Cohen algebras need not be Cohen -- Logic: from Foundations to Applications (1996) 261--275
FKSh:549 1995-08-25 [pdf] [ps] [abstract] [arXiv:math.LO/9508220]
Fuchino+Koppelberg+Shelah, Partial orderings with the weak Freese-Nation property -- Annals Pure and Applied Logic 80 (1996) 35-54
FKSh:556 1995-05-07 [pdf] [ps] [abstract] [arXiv:math.LO/9505212]
Fuchino+Koppelberg+Shelah, A game on partial orderings -- Topology and its Applications 74 (1996) 141-148

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