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Scientific notes and problems
On ordered systems of closed and open sets
P. S. Aleksandrov
Citation:
P. S. Aleksandrov, “On ordered systems of closed and open sets”, Russian Math. Surveys, 5:2 (1950)
Linking options:
https://www.mathnet.ru/eng/rm8417 https://www.mathnet.ru/eng/rm/v5/i2/p178
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