A. Jong, J. Torniainen, O. V. Bourski, W. Heim, and L. Edenius, “Tracing the origin of vagrant Siberian songbirds with stable isotopes: the case of Yellow-browed Warbler (Abrornis inornatus) in Fennoscandia”, Ornis Fenn, vol. 96, no. 2, pp. 90–99, Jul. 2019.