Citation: J. Sanz-lopez et al., Stratigraphy of Lower Cambrian and unconformable Lower Carboniferous beds from the Valls unit (Catalonian Coastal Ranges), CR AC S IIA, 330(2), 2000, pp. 147-153
Citation: Tp. Crimes et D. Mcilroy, A biota of Ediacaran aspect from lower Cambrian strata on the Digermul Peninsula, Arctic Norway, GEOL MAG, 136(6), 1999, pp. 633-642