@article {Voutova1992,
	title = {Filigranological Study of the Paper of the Earliest Greek Manuscripts Preserved at the Bulgarian National Library (14th c.)},
	journal = {Palaeobulgarica / Старобългаристика},
	volume = {16},
	year = {1992},
	pages = {54{\textendash}72},
	author = {Voutova, Nina}
}
