Geodesic
Coefficient inequality for multivalent bounded turning functions of order $\alpha$
Problemy analiza, Tome 5 (2016) no. 1, pp. 45-54.

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The objective of this paper is to obtain the sharp upper bound to the $H_{2}(p+1)$, second Hankel determinant for $p$-valent (multivalent) analytic bounded turning functions (also called functions whose derivatives have positive real parts) of order $\alpha~ (0\leq\alpha1)$, using Toeplitz determinants. The result presented here includes three known results as their special cases.
Keywords: $p$-valent analytic function; bounded turning function; upper bound; Hankel determinant; positive real function; Toeplitz determinants. 
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D. Vamshee Krishna; T. RamReddy. Coefficient inequality for multivalent bounded turning functions of order $\alpha$. Problemy analiza, Tome 5 (2016) no. 1, pp. 45-54. http://geodesic.mathdoc.fr/item/PA_2016_5_1_a3/

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