Ritchie, J. N. G.; Marwick, E. W.; Henshall, A. S.; Savory, L.; Clutton-Brock, J.; Caseldine, C. J.; Whittington, G.; Dickson, C. A.; Dickson, J. H.; MacLean, C. The Stones of Stenness, Orkney: With an Account of the Stone of Odin. PSAS 1978, 107, 1-60.