S.B. Kroonenberg, R.M. van den Berg van Saparoea, and A.T.J. Jonker. 1987. “Late Glacial and Holocene Development of Semi-Closed Depressions (thaw lakes?) in the Limagne Rift Valley, French Central Massif”. Netherlands Journal of Geosciences, January, 297-311. https://njgjournal.nl/index.php/njg/article/view/13113.