Evans, John (January 1860). "On the Occurrence of Flint Implements in undisturbed Beds of Gravel, Sand, and Clay". Archaeologia. London. 38: 280–307. doi:10.1017/s0261340900001454. Archived from the original on 2012-02-26. Retrieved 2012-02-24.
Prestwich, Joseph (January 1860). "On the Occurrence of Flint-implements, associated with the Remains of Animals of Extinct Species in Beds of a late Geological Period, in France at Amiens and Abbeville, and in England at Hoxne" (PDF). Philosophical Transactions of the Royal Society. London. 150: 277–317. doi:10.1098/rstl.1860.0018. Archived from the original on 2012-02-26. Retrieved 2012-02-24.
