Yahyaev Aydin Bilal Ogly, born in 1958. Graduated from Azerbaijan Engineering-Construction Institute (1981) (at the present time - Azerbaijan University of Architecture and Construction). PhD in Technical Sciences, associated Professor for Azerbaijan University of Architecture and Construction, Senior Research Scientist for the Laboratory of Woody Plants at the Central Botanical Garden of the National Academy of Sciences of Azerbaijan. Author and co-author of 50 papers in the field of studying forest resources, regularities of structure and productivity of beech forests of the Greater Caucasus, and timber. Some of them: "Fundamentals of Forestry. Textbook" (in Azerbaijani); "Timber Harvesting. Textbook" (in Azerbaijani). The main publications: «Anthropogenic dynamics of forests at north-east slope of the Greater Caucasus» In «Proc. Inst. Botan. Nat. Acad. Sci. Azerbaijan», 2007; «The impact of climatic conditions to beech distribution in the Caucasus» In «Ekoenergetika» (Ecoenergy), 2011; «Developing yield tables for beech forests of the north-east slope of the Greater Caucasus» In «Sci. Notes of Azerbaijan Univ. Architect. & Construct.», 2012; «The peculiarities of economic evaluation of beech tree stands in the Greater Caucasus» In «Proc. Centr. Botan. Gard. Nat. Acad. Sci. Azerbaijan», 2013. The Results of Complex Selective Logging in Beech-Hornbeam Tree Stands of the Greater Caucasus in Azerbaijan In "Sibirski Lesnoi Zurnal" (Sib. J. For. Sci.), 2014 (in Russian with abstract in English).