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| * Herget, G., 1988, Stresses in rock: Rotterdam, Balkema, 177 p. | | * Herget, G., 1988, Stresses in rock: Rotterdam, Balkema, 177 p. |
| * Harrison, J. P., and J. A. Hudson, 2000, Engineering rock mechanics – Part 2: Illustrative worked examples: Oxford, U.K., Elsevier Science, 524 p. | | * Harrison, J. P., and J. A. Hudson, 2000, Engineering rock mechanics – Part 2: Illustrative worked examples: Oxford, U.K., Elsevier Science, 524 p. |
− | | + | * Hudson, J., and J. Harrison, 1997, Engineering rock mechanics: An introduction to the principles: Amsterdam, Netherlands, Elsevier, 456 p. |
− | Hudson, J., & Harrison, J.,1997, Engineering rock mechanics an introduction to the principles.
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| Koolen, A.J. & Kuipers H.,1983, Agricultural soil mechanics: Advanced series in agricultural sciences, Vol.13. springer, Heidelberg, 241 pp. | | Koolen, A.J. & Kuipers H.,1983, Agricultural soil mechanics: Advanced series in agricultural sciences, Vol.13. springer, Heidelberg, 241 pp. |