1. Bell, F. G., 1975, Site investigations in areas of mining subsidence: London, Newnes-Butterworths.
2. Institution of Civil Engineers, 1977, Ground subsidence: London, Th. Telford.
3. Kratzsch, H., 1983. Mining subsidence engineering: Berlin, Heidelberg, New York, Springer-Verlag.
4. National Coal Board, Subsidence engineers’ handbook: London, NCB.
5. Peng, S., 1978, Coal mine ground control: New York, Wiley.