Alpha, beta and gamma diversity controls on Ordovician-Silurian brachiopods of the Baltic BasinsKröger, Björn; Penny, A.; Hints, Olle13th International Symposium on the Ordovician System : Novosibirsk, Russia (July 19-22, 2019) : contributions2019 / p. 107 http://www.igcp653.org/wp-content/uploads/2019/07/ISOS13Proceedings.pdf