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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1961 Jan;47(1):113–114. doi: 10.1073/pnas.47.1.113

STRENGTHENING OF SPERNER'S LEMMA APPLIED TO HOMOLOGY THEORY

A B Brown 1,2, S S Cairns 1,2
PMCID: PMC285253  PMID: 16590803

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