Larsen , G., J. Eiríksson, K. L. Knudsen, and J. Heinemeier. “Correlation of Late Holocene Terrestrial and Marine Tephra Markers, North Iceland: Implications for Reservoir Age Changes”. Polar Research, vol. 21, no. 2, Jan. 2002, pp. 283-90, doi:10.3402/polar.v21i2.6489.