Panizzo, V. N., Jones, V. J., Birks, H. J.B., Boyle, J. F., Brooks, S. J., Leng, M. J., "A multiproxy palaeolimnological investigation of Holocene environmental change, between c. 10 700 and 7200 years BP, at Holebudalen, southern Norway", Holocene, 2008