"A Problem of Ulam on Planar Graphs."

János Pach (1981)

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DOI: 10.1016/S0195-6698(81)80043-1

access: open

type: Journal Article

metadata version: 2021-02-12

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János Pach:
A Problem of Ulam on Planar Graphs. Eur. J. Comb. 2(4): 357-361 (1981)

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