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1by Nayden Prahov, Hristina Angelova, Alexander Kotsev, Anton Popov, Stelian DimitrovGet full text
Published 2011-12-01
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2by Stelian Dimitrov, Georgi Georgiev, Margarita Georgieva, Maria Gluschkova, Ventsislava Chepisheva, Plamen Mirchev, Miglena ZhiyanskiGet full text
Published 2018-02-01
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3by Anastasiia Safonova, Yousif Hamad, Egor Dmitriev, Georgi Georgiev, Vladislav Trenkin, Margarita Georgieva, Stelian Dimitrov, Martin IlievGet full text
Published 2021-08-01
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4by Stoyan Nedkov, Miglena Zhiyanski, Stelian Dimitrov, Bilyana Borisova, Anton Popov, Ivo Ihtimanski, Rositsa Yaneva, Petar Nikolov, Svetla Bratanova-DonchevaGet full text
Published 2017-12-01
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