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(English).
In:
Frolík, Z. (ed.): Abstracta. 5th Winter School on Abstract Analysis.
Czechoslovak Academy of Sciences, Praha, 1977.
pp. 73-77
Pavelka, Jan: On closed lattices.
(English).
In:
Frolík, Z. (ed.): Abstracta. 4th Winter School on Abstract Analysis.
Czechoslovak Academy of Sciences, Praha, 1976.
pp. 31-41
