Journal of Classical Analysis · Volume 19, Issue 1 Improved upper bound of third order Hankel determinant for Ozaki close-to-convex functions 19-02 Pages 13-19 DOI 10.7153/jca-2022-19-02 Downloads Short PDF Full PDF PNG Authors Milutin Obradović Nikola Tuneski Keywords analytic univalent Hankel determinant upper bound Ozaki close-to-convex Subject classes 30C45 30C15