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Bibliografia
[B] J. Baumgartner, Applications of the proper forcing axiom, in: Handbook of Set-Theoretic Topology, K. Kunen and J. E. Vaughan (eds.), North-Holland, Amsterdam, 1984, 913-959.
[BJZ] B. Balcar, T. Jech and J. Zapletal, Generalizations of Cohen algebras, Ann. Pure Appl. Logic, to appear.
[J] T. Jech, Set Theory, Academic Press New York, 1978.
[JS] T. Jech and S. Shelah, Possible PCF algebras, J. Symbolic Logic 61 (1996), 313-318.
[K] S. Koppelberg, Characterization of Cohen algebras, in: Papers on General Topology and Applications, S. Andima, R. Kopperman, P. R. Misra and A. R. Todd (eds.), Ann. New York Acad. Sci. 704, 1993, 227-237.
[S] S. Shelah, Proper Forcing, Springer, New York, 1982.
[T] S. Tennenbaum, Souslin's problem, Proc. Nat. Acad. Sci. U.S.A. 59 (1968), 60-63.
[Z] J. Zapletal, Characterization of the club forcing, in: Papers on General Topology and Applications, S. Andima, R. C. Flagg, G. Itzkowitz, Y. Kong, R. Kopperman and P. Misra (eds.), Ann. New York Acad. Sci. 806, 1996, 476-484.