Geodesic
On the logarithmic derivative of a~meromorphic function
Matematičeskie zametki, Tome 15 (1974) no. 5, pp. 711-718

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We derive the following estimate for the quantity $m\bigl(r,\frac{f'}f\bigr)$ of the Nevanlinna theory of the distribution of values characterizing the growth of the logarithmic derivative of a meromorphic function $f(z)$, $f(0)=1$, $0$: $$ m\bigl(r,\frac{f'}f\bigr)\ln+\biggl[\frac{T(R,f)}r\Bigl(\frac R{R-r}\Bigr)^2\biggr]+6,0684. $$ This estimate is more accurate than that obtained earlier by Vu Ngoyan and I. V. Ostrovskii. 
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     author = {A. S. Kolokol'nikov},
     title = {On the logarithmic derivative of a~meromorphic function},
     journal = {Matemati\v{c}eskie zametki},
     pages = {711--718},
     publisher = {mathdoc},
     volume = {15},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_5_a6/}
}
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A. S. Kolokol'nikov. On the logarithmic derivative of a~meromorphic function. Matematičeskie zametki, Tome 15 (1974) no. 5, pp. 711-718. http://geodesic.mathdoc.fr/item/MZM_1974_15_5_a6/