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$$\mathcal {H}^+$$ H + -multivalued contractions and their application to homotopy theory

Crossref DOI link: https://doi.org/10.1007/s11784-017-0425-1

Published Online: 2017-04-01

Published Print: 2017-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy