Pedersen , Åshild Ø., Tombre , I., Jepsen , J. U., Eidesen , P. B., Fuglei , E. and Stien , A. (2013) “Spatial patterns of goose grubbing suggest elevated grubbing in dry habitats linked to early snowmelt”, Polar Research, 320. doi: 10.3402/polar.v32i0.19719.