Colman, J. E., Eidesen, R., Hjermann, D., Gaup, M. A., Holand, Øystein, Moe, S. R. and Reimers, E. (2004) “Reindeer 24-hr within and between group synchronicity in summer versus environmental variables”, Rangifer, 24(1), pp. 25–30. doi: 10.7557/2.24.1.298.