@incollection{,
address  = {},
author = {Strzelczyk, Jerzy},
booktitle = {FS Waclaw Korta},
keywords = {Willigis <Mainz, Erzbischof> (940-1011); Strzelczyk, Jerzy (1941-)},
pages = {55-65},
title={Willigis z Moguncji},
uniqueid = {885003},
url = {http://opac.regesta-imperii.de/id/885003},
year = {2001}
}