Authors

Borislav Grigorov                

Sofia University "St. Kliment Ohridski", Sofia, Bulgaria

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Mariya Grozeva

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Desislava Hristova            

National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria

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Raina Hristova

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Ivo Ihtimanski            

National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria

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Rosen Iliev

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Nadezhda Ilieva            

National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria

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Subin Ivanov

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Miroslav Ivanov            

South-West University "Neofit Rilski", Blagoevgrad, Bulgaria

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Dimka Ivanova

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Georgi Jelev

Space Research Institute , Sofia, Bulgaria

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Mustafa Kahraman        

Istabul Universty, Istanbul, Turkiye

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