1. Algeo T.J. Scheckler S.E. Maynard J.B. 2001. Effects of the Middle to Late Devonian spread of vascular land plants on weathering regimes, marine biotas, and global climate. In: Gensel P.G. Edwards D. (eds) Plants Invade the Land: Evolutionary and Environmental Perspectives. Columbia University Press, New York, 213–236.
2. STUDIES IN FLUVIATILE SEDIMENTATION: SIX CYCLOTHEMS FROM THE LOWER OLD RED SANDSTONE, ANGLOWELSH BASIN
3. Studies in fluviatile sedimentation: implications of pedogenic carbonate units, Lower Old Red Sandstone, Anglo-Welsh outcrop;Allen;Geological Journal,1974
4. Allen J.R.L. 1986. Pedogenic calcretes in the Old Red Sandstone facies (Late Silurian–Early Carboniferous) of the Anglo-Welsh Area, southern Britain. In: Wright V.P. (ed.) Paleosols: Their Recognition and Interpretation. Blackwell Scientific, Oxford, 58–86.
5. Lower Old Red Sandstone fluvial dispersal systems in the British Isles