About this article
Published Online: Nov 05, 2014
Page range: 99 - 104
DOI: https://doi.org/10.2478/amb-2014-0013
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© 2014
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Radenkova-Saeva, J.
Atanasov, P.