Topologies with -complements
E. Steiner, A. Steiner (1967)
Fundamenta Mathematicae
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E. Steiner, A. Steiner (1967)
Fundamenta Mathematicae
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Queiroz, Maria Lúcia B. de (1987)
Portugaliae mathematica
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W. Zawadowski (1968)
Studia Mathematica
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Ladislav, Jr. Mišík (1985)
Mathematica Slovaca
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D. Garling (1968)
Studia Mathematica
Similarity:
Helena Nonas (1978)
Fundamenta Mathematicae
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S. Schonefeld, W. Stiles (1976)
Studia Mathematica
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A. Wiweger (1961)
Studia Mathematica
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L. Baric (1971)
Studia Mathematica
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