Stephenson, F.R.; Morrison, L.V. (1995). „Long-term fluctuations in the Earth's rotation: 700 BC to AD 1990”. Philosophical Transactions of the Royal Society of London A. 351 (1695): 165—202. Bibcode:1995RSPTA.351..165S. doi:10.1098/rsta.1995.0028.
Stephenson, F.R.; Morrison, L.V. (1995). „Long-term fluctuations in the Earth's rotation: 700 BC to AD 1990”. Philosophical Transactions of the Royal Society of London A. 351 (1695): 165—202. Bibcode:1995RSPTA.351..165S. doi:10.1098/rsta.1995.0028.