Gotaas, Geir, Eric Milne, Paul Haggarty, and TylerNicholas J.C. 2000. “Loss of Deuterium in Faecal Solids and by Sequestration in Reindeer: Effect on Doubly Labelled Water Studies”. Rangifer 20 (1), 31-41. https://doi.org/10.7557/2.20.1.1500.