Probable stone grave burials of Upsi and Surnuaiamäe around Viidumäe area. (EST)
Mägi, M. (2020). Probable stone grave burials of Upsi and Surnuaiamäe around Viidumäe area. (EST: Upsi ja Surnuaiamäe arvatavad kivikalmed Viidumäe ümbruses. Saaremaa vald, endine Kihelkonna kihelkond ja vald, Saaremaa). Report on archaeological excavations. Tallinna University, Institute of Humanities, Institute of History, Archaeology and Art History.