@article {Pljakov1989,
	title = {La r{\'e}gion de la Moyenne Struma aux VIIe{\textendash}IXe si{\`e}cles},
	journal = {Palaeobulgarica / Старобългаристика},
	volume = {13},
	year = {1989},
	pages = {100{\textendash}115},
	author = {Pljakov, Zdravko}
}
