Open Chemistry > 2014 > 12 > 11 > 1169-1175
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journal ISSN : | 2391-5420 |
DOI | 10.2478/s11532-014-0560-0 |
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Bibliography
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[1] I. Kuleff, R. Djingova, Archaeolgia Bulgarica VI, 101 (2002)
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[2] V. Zlatarski, History of Bulgarian state during the Middle Ages (Academic Press Marin Drinov, Sofia, 1994), (in Bulgarian) Vol. 1, Part 2
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[3] D. Aladzhov, Bulletin of the Museums from South-East Bulgaria 20, 17 (1994) (in Bulgarian)