Geodesic
Some sharp estimates for typically real functions
Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part XXVII, Tome 428 (2014), pp. 81-88 
E. G. Goluzina. Some sharp estimates for typically real functions. Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part XXVII, Tome 428 (2014), pp. 81-88. http://geodesic.mathdoc.fr/item/ZNSL_2014_428_a5/
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     author = {E. G. Goluzina},
     title = {Some sharp estimates for typically real functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {81--88},
     year = {2014},
     volume = {428},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2014_428_a5/}
}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

Let $T$ be the class of functions $f(z)=z+\sum^\infty_{n=r}c_nz^n$ regular and typically real in the disk $|z|<1$. Sharp estimates for the coefficients $c_3$ and $c_4$ in terms of the values $f(r)$, $0, are obtained.

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[4] J. A. Jenkins, “Some problems for typically real functions”, Canad. J. Math., 13 (1961), 427–431 | DOI | MR