Olsen , L., H. Sveian, K. van der Borg, B. Bergstram, and M. Broekmans. “Rapid and Rhythmic Ice Sheet Fluctuations in Western Scandinavia 15-40 Kya–a Review”. Polar Research, vol. 21, no. 2, Jan. 2002, pp. 235-42, doi:10.3402/polar.v21i2.6483.