1Sharon Vail, “Sourdough: More Than a Bread”.
2Heiss, Andreas G et al. “State of the (t)art. Analytical approaches in the investigation of components and production traits of archaeological bread-like objects, applied to two finds from the Neolithic lakeshore settlement Parkhaus Opéra (Zürich, Switzerland).”
3Kat Eschner. “Gold Miners Kept Their Sourdough Starters Alive By Cuddling Them.”