1. Yuan, R. L. and Chen, W. F., ‘Study of sulphur-impregnated brick, block prism and concrete pipes’, “Sulphur in Construction”, proceedings of an international conference (Ottawa, Ontario, September 1978) pp. 91–106.
2. Platou, J., ‘Sulphur-impregnated concrete’,Sulph. Inst. J. II (1) (1975) 2–4.
3. Carpentier, A., ‘Study of the impregnation of ceramic tiles under vacuum’, “New Uses of Sulfur and Pyrites”, symposium proceedings (Madrid, May 1976) pp. 118–131.
4. Ravaglioli, A., Balli, M. F. and Negi, G., ‘Sulphur impregnation of fired ceramic bodies. An investigation into its effects on pore size distribution and frost resistance’, “New Uses of Sulfur and Pyrites”, symposium proceedings (Madrid, May 1976) pp. 132–142.
5. Neville, A. M., ‘Essentials of strength and durability of various types of concrete with special reference to sulphur’, “Sulphur in Construction”, proceedings of an international conference (Ottawa, Ontario, September 1978) pp. 17–44.