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- [8] Upper Bound to Second Hankel Determinant for a family of Bi-Univalent Functions BOLETIM SOCIEDADE PARANAENSE DE MATEMATICA, 2023, 41 : 13 - 13
- [10] UPPER BOUND OF SECOND HANKEL DETERMINANT FOR A SUBCLASS OF BI-UNIVALENT FUNCTIONS OF COMPLEX ORDER COMMUNICATIONS OF THE KOREAN MATHEMATICAL SOCIETY, 2019, 34 (03): : 783 - 797