О центрально симметрических графах
Anton Kotzig (1968)
Czechoslovak Mathematical Journal
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Anton Kotzig (1968)
Czechoslovak Mathematical Journal
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Г. Гарг (1973)
Fundamenta Mathematicae
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П. Александров, В. Пoномapeв (1962)
Fundamenta Mathematicae
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Eduard Čech (1952)
Czechoslovak Mathematical Journal
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G. Ja. Rotkovič (1977)
Czechoslovak Mathematical Journal
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