@book {Ковтун1989,
	title = {Азбуковники XVI -XVII вв. : Старшая разновидность},
	year = {1989},
	pages = {293},
	publisher = {Наука},
	organization = {Наука},
	address = {Ленинград},
	author = {Ковтун, Людмила С}
}
