{"id":"001499943","type":"article","title":"Сложение посульского рубежа Переяславской земли=Development of the Sula River frontier of the Pereyaslavl Land","pages":"284-297","container-title":"Kratkie soobščenija, 241 (2015","author":[{"family":"Morgunov","given":"Ju. Ju."}],"issued":{"raw":"2015"}}