@book {Лихачев1987, title = {Словарь книжников и книжности Древней Руси}, volume = {Вып. 1. XI{\textendash}первая половина XIV в.}, year = {1987}, pages = {493}, publisher = {Наука}, organization = {Наука}, address = {Ленинград}, editor = {Лихачев, Дмитрий} }