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Bibliography

[B]

Heinz Bachmann, Transfinite Zahlen, Zweite Auflage, Springer-Verlag, Berlin, 1967. MR 0219424 (36:2506)

[B]

D. D. Booth, Some consistency questions in topology, Notices Amer. Math. Soc. 15 (1968), 641.

[CN]

W. W. Comfort and S. Negrepontis, Homeomorphs of three subspaces of , Math. Z. 107 (1968), 53-58. MR 0234422 (38:2739)

[DY]

Ph. Dwinger and F. M. Yaqub, Generalized free products of Boolean algebras with an amalgamated subalgebra, Indag. Math. 25 (1963), 225-231. MR 0148587 (26:6094)

[E]

A. S. Esenin-Vol'pin, On the existence of a universal bicompactum of arbitrary weight, Dokl. Akad. Nauk SSSR 68 (1949), 649-652. MR 0031534 (11:165h)

[F]

Zdeněk Frolík, Sums of ultrafilters, Bull. Amer. Math. Soc. 73 (1967), 87-91. MR 0203676 (34:3525)

[FG]

N. J. Fine and L. Gillman, Extension of continuous functions in , Bull. Amer. Math. Soc. 66 (1960), 376-381. MR 0123291 (23:A619)

[G]

Andrew M. Gleason, Projective topological spaces, Illinois J. Math. 2 (1958), 482-489. MR 0121775 (22:12509)

[GJ]

Leonard Gillman and Meyer Jerison, Rings of continuous functions, Van Nostrand, Princeton, N.J., 1960. MR 0116199 (22:6994)

[HR]

Kenneth Hoffman and Arlan Ramsay, Algebras of bounded sequences, Pacific J. Math. 15 (1965), 1239-1248. MR 0198283 (33:6442)

[J]

B. Jónsson, Universal relational systems, Math. Scand. 4 (1956), 193-208. MR 0096608 (20:3091)

[J]

-, Homogeneous universal relational systems, Math. Scand. 8 (1960), 137-142. MR 0125021 (23:A2328)

[K]

H. Jerome Keisler, Universal homogeneous Boolean algebras, Michigan Math. J. 13 (1966), 129-132. MR 0195770 (33:3968)

[MV]

Michael Morley and Robert Vaught, Homogeneous universal models, Math. Scand. 11 (1962), 37-57. MR 0150032 (27:37)

[N]

Stelios Negrepontis, On a theorem by Hoffman and Ramsay, Pacific J. Math. 20 (1967), 281-282. MR 0209845 (35:741)

[N]

-, Extension of continuous functions in , Indag. Math. 30 (1968), 393-400. MR 0240783 (39:2128)

[P]

I. I. Parovičenko, A universal bicompact of weight , Dokl. Akad. Nauk SSSR 150 (1963), 36-39. MR 0150732 (27:719)

[R]

Mary Ellen Rudin, ``Types of ultrafilters,'' in Topology Seminar, Wisconsin, 1965, Ann. of Math. Studies No. 60, Princeton Univ. Press, Princeton, N. J., 1966, pp. 147-151. MR 0216451 (35:7284)

[R]

Walter Rudin, Homogeneity problems in the theory of Čech compactifications, Duke J. Math. 23 (1956), 409-419. MR 0080902 (18:324d)

[S]

Wacław Sierpiński, Sur les espaces métriques universels, Fund. Math. 33 (1945), 123-136. MR 0015452 (7:420e)

[S]

Roman Sikorski, Boolean algebras, 2nd ed., Springer-Verlag, Berlin, 1964.