Gillman, L.: The space $\beta N$ and the continuum hypothesis.
(English).
In:
General Topology and its Relations to Modern Analysis and Algebra.
Proceedings of the second Prague topological symposium, 1966.
Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1967.
pp. 144-146
Prodanov, I.: Компактные представления непрерывных алгебраических структур.
(Russian) [Compact representations of continuous algebraic structures].
In:
General Topology and its Relations to Modern Analysis and Algebra.
Proceedings of the second Prague topological symposium, 1966.
Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1967.
pp. 290-294
Ivanova, V. M.; Ivanov, A. A.: Отношения смежности и $H$-замкнутые расширния.
(Russian) [Contiguity relations and $H$-closed extenstions].
In:
General Topology and its Relations to Modern Analysis and Algebra.
Proceedings of the second Prague topological symposium, 1966.
Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1967.
pp. 195-199
Gillman, L.: Remote points in $\beta R$.
(English).
In:
General Topology and its Relations to Modern Analysis and Algebra.
Proceedings of the symposium held in Prague in September 1961.
Academia Publishing House of the Czechoslovak Academy of Sciences, Prague, 1962.
pp. 175-176
