1. Charles J A (1973). Correlation between laboratory behaviour of rockfill and field performance with particular reference to Scammonden Dam. PhD thesis, University of London.
2. Charles J A (1976). The use of one-dimensional compression tests and elastic theory in predicting deformations of rockfill embankments. Canadian Geotechnical Journal, vol 13, no 3, pp 189–200.
3. Charles J A (1987). Discussion contribution on Collapse compression of fills. Proceedings of 9th European Conference on Soil Mechanics and Foundation Engineering, Dublin, vol 3, pp 1079–1080.
4. Charles J A, Naismith W A and Burford D (1977). Settlement of backfill at Horsley restored opencast coal mining site. Proceedings of Conference on Large Ground Movements and Structures, Cardiff, pp 229–251. Pentech Press, London.
5. Charles J A, Hughes D B and Burford D (1984). The effect of a rise of water table on the settlement of backfill at Horsley restored opencast coal mining site, 1973–1983. Proceedings of 3rd International Conference on Ground Movements and Structures, Cardiff, pp 423–442. Pentech Press, London.