{"id":"001460660","type":"article","title":"Some problems of the history of early Izborsk fortifications","publisher":"Izdatel'stvo \"Nauka\"","publisher-place":"Moskva","pages":"213-220","container-title":"Kratkie soobščenija Instituta Archeologii","author":[{"family":"Lopatin","given":"Nikolaj Vladimirovič"}],"issued":{"raw":"2012"}}