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Helicoidal surfaces satisfying $${\Delta ^{II}\mathbf{G}=f(\mathbf{G}+C)}$$ Δ II G = f ( G + C )

Crossref DOI link: https://doi.org/10.1007/s00022-015-0284-0

Published Online: 2015-07-22

Published Print: 2016-12

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