Zilmer, K. (2005). "He drowned in Holmr's Sea, his cargo-ship drifted to the sea-bottom, only three came out alive": Records and representations of Baltic traffic in the Viking age and the early Middle Ages in early Nordic sources. Tartu University Press.

Zilmer, Kristel. "He Drowned in Holmr's Sea, His Cargo-ship Drifted to the Sea-bottom, Only Three Came Out Alive": Records and Representations of Baltic Traffic in the Viking Age and the Early Middle Ages in Early Nordic Sources. [Tartu]: Tartu University Press, 2005.

Zilmer, Kristel. "He Drowned in Holmr's Sea, His Cargo-ship Drifted to the Sea-bottom, Only Three Came Out Alive": Records and Representations of Baltic Traffic in the Viking Age and the Early Middle Ages in Early Nordic Sources. Tartu University Press, 2005.