"The GICC05 time scale". Centre for Ice and Climate – University of Copenhagen. 3 September 2009. Archived from the original on 18 September 2018. Retrieved September 17, 2018.
"The GICC05 time scale". Centre for Ice and Climate – University of Copenhagen. 3 September 2009. Archived from the original on 18 September 2018. Retrieved September 17, 2018.