@Book{215360702,
author="B{\"o}hmer, Johann Friedrich",
title="Regesta Imperii: 1152 (1122) - 1190",
year="1980",
publisher="B{\"o}hlau",
address="Wien [u.a.]",
note="Johann Friedrich B{\"o}hmer",
isbn="3205087079",
language="German"
}