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Statističeski charakteristiki na publikacionnata dejnost na bălgarskite učeni : (po SCI, 1986 - 1993 g.)
Rožkov, Sergej - In: Statistika / Nacionalen Statističeski Institut 37 (1995) 2, pp. 48-60
Persistent link: https://www.econbiz.de/10001203839
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Naukata v Bălgarija prez perioda 1981 - 1998 g. : bibliometričen analiz
Rožkov, Sergej; Ivančeva, Ljudmila - In: Statistika / Nacionalen Statističeski Institut 53 (2001) 2, pp. 74-88
Persistent link: https://www.econbiz.de/10001607116
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Korporativen imidž na tărgovskite banki (1996 - 1997 g.)
Nedelčev, Miroslav - 2002
Persistent link: https://www.econbiz.de/10002439720