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This research was supported by a grant from the United States-Israel Binational Science Foundation (BSF), Jerusalem, Israel.
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Hummel, J.A., Pinchuk, B. The second coefficient of bounded univalent functions which cover a fixed disc. J. Anal. Math. 46, 167–175 (1986). https://doi.org/10.1007/BF02796582
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DOI: https://doi.org/10.1007/BF02796582