Geodesic
The module method and some extremal problems in the class~$\Sigma(r)$
Zapiski Nauchnykh Seminarov POMI, Analytical theory of numbers and theory of functions. Part 28, Tome 418 (2013), pp. 136-152

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Let $\Sigma(r)$ denote some class of functions $f(z)$ meromorphic and univalent for $|z|>1$. In the class $\Sigma(r)$, some extremal problems are solved. The proofs are based on the module method. 
@article{ZNSL_2013_418_a8,
     author = {G. V. Kuz'mina},
     title = {The module method and some extremal problems in the class~$\Sigma(r)$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {136--152},
     publisher = {mathdoc},
     volume = {418},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_418_a8/}
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G. V. Kuz'mina. The module method and some extremal problems in the class~$\Sigma(r)$. Zapiski Nauchnykh Seminarov POMI, Analytical theory of numbers and theory of functions. Part 28, Tome 418 (2013), pp. 136-152. http://geodesic.mathdoc.fr/item/ZNSL_2013_418_a8/