Alley, Richard B.; Ágústsdóttir, Anna Maria (2005). "The 8k event: cause and consequences of a major Holocene abrupt climate change". Quaternary Science Reviews. 24 (10–11): 1123–49. Bibcode:2005QSRv...24.1123A. doi:10.1016/j.quascirev.2004.12.004.
eb.co.uk
library.eb.co.uk
"Neolithic". Encyclopaedia Britannica. 2019. Retrieved 6 November 2019.
Alley, Richard B.; Ágústsdóttir, Anna Maria (2005). "The 8k event: cause and consequences of a major Holocene abrupt climate change". Quaternary Science Reviews. 24 (10–11): 1123–49. Bibcode:2005QSRv...24.1123A. doi:10.1016/j.quascirev.2004.12.004.