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Analytic Hypoellipticity for a New Class of Sums of Squares of Vector Fields in $${\mathcal {R}}^3$$ R 3

Crossref DOI link: https://doi.org/10.1007/s12220-016-9716-9

Published Online: 2016-06-28

Published Print: 2017-04

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