Petkov, Plamen,Achour, Mohammed Essaid,Popov, Cyril
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Abhay Ashtekar (EDT)/ Vesselin Petkov (EDT)
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Eddington Arthur S. Eddington;Vesselin Petkov, Petkov
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Edited by Peter Moeck 、Sven Hovmöller 、Stavros Nicolopoulos 、Sergei Rouvimov 、Valeri Petkov 、Milen Gateshki 、Phil Fraundorf
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J. p. Reithmaier (EDT)/ P. Paunovic (EDT)/ W. Kulisch (EDT)/ C. Popov (EDT)/ P. Petkov (EDT)
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Jeremiah Grossman/ Robert Hansen/ Petko D. Petkov/ Anton Rager/ Seth Fogie (EDT)
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Johann Peter Reithmaier (EDT)/ Plamen Petkov (EDT)/ Wilhelm Kulisch (EDT)
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Johann Peter Reithmaier (EDT)/ Plamen Petkov (EDT)/ Wilhelm Kulisch (EDT)/ Cyril Popov (EDT)
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Kiril Arnaudov/ Dimitar Petkov Karaivanov
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Lucio Grandinetti (EDT)/ Thomas Lippert (EDT)/ Nicolai Petkov (EDT)
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Michael Cross/ Steven Kapinos/ Haroon Meer/ Igor Muttik Ph.D./ Steve Palmer/ Petko D. Petkov/ Roger Shields/ Roelof Temmingh
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N. Petkov (EDT)/ N. Strisciuglio (EDT)/ C. M. Travieso-gonz嫮ez (EDT)
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