1. Some effects of bioturbation by earthworms (Oligochaeta) on archaeological sites;Armour-Chelu;Journal of Archaeological Science,1994
2. Worms and weathering;Atkinson;Antiquity,1957
3. A pond barrow at Winterbourne Steepleton, Dorset;Atkinson;Archaeological Journal,1951
4. The formation of carbonate nodules and intercalary crystals in the soil by the earthworm Lumbricus rubellus;Bal;Pedobiologia,1977
5. Techniques of Archaeological Excavation;Barker,1993