Dmitry A. Endovitsky (EDT)/ Elena G. Popkova (EDT)
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Marina L. Alpidovskaya (EDT)/ Elena G. Popkova (EDT)
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Alexander P. Sukhodolov (EDT)/ Elena G. Popkova (EDT)/ Tatiana N. Litvinova (EDT)
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Alexander P. Sukhodolov/ Elena G. Popkova/ Irina M. Kuzlaeva
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Bruno S. Sergi (EDT)/ Elena G. Popkova (EDT)/ Aleksei V. Bogoviz (EDT)/ Tatiana N. Litvinova (EDT)
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Elena G. Popkova (EDT)/ Alina V. Chesnokova (EDT)/ Irina A. Morozova (EDT)
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Elena G. Popkova (EDT)/ Bruno S. Sergi (EDT)/ Lubinda Haabazoka (EDT)/ Julia V. Ragulina (EDT)
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Elena G. Popkova/ Yakov A. Sukhodolov
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Popkova, Elena G.,Alpidovskaya, Marina L.
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Popkova, Elena G.,Bogoviz, Aleksei V.,Krivtsov, Artem
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;Elena G. Popkova, Popkova,Bruno S. Sergi, Sergi
(1)