1. P. Erdös, A. Hajnal, A. Maté, and R. Rado (1984) Combinatorial Set Theory: Partition Relations for Cardinals, North-Holland.
2. T. Jech (1978) Set Theory, Academic Press.
3. K. Kunen (1980) Set Theory: An Introduction to Independence Proofs, North-Holland.
4. R. Laver (1979) Linear orders in (?)? under eventual dominance, Logic Coll. '78, North-Holland, pp. 299?302.
5. E. C. Milner and M. Pouzet (1982) On the cofinality of partially ordered sets. Ordered Sets (ed. I. Rival), D. Reidel Publ. Co., pp. 279?298.