Mägi, M. (2002). At the Crossroads of Space and Time. Graves, Changing Society and Ideology on Saaremaa (Ösel), 9th–13th centuries AD. Tallinn: Ajaloo Instituut, Tallinn/Center of Baltic Studies, Gotland, p. 100. Read the book: here. Look at the drawings of the archaeological excavations: here.
Mägi-Lõugas, M. (1994). Estonian Viking-Age Penannular Brooches and Ornament. (EST: Eesti viikingiaegsed hoburaudsõled ja nende ornament.) Eesti TA Toim. Humanitaar- ja Sotsiaalteadused 43, 4 (465-484). Read the ENG conclusion (p. 483-483): here.