Bardet, J.-P. (1997). Experimental Soil Mechanics. Prentice Hall. ISBN 978-0-13-374935-9. 978-0-13-374935-9
Price, D.G. (2009). De Freitas, M.H. (ed.). Engineering Geology: Principles and Practice. Springer. p. 450. ISBN 978-3-540-29249-4. 978-3-540-29249-4
Price, D.G. (2009). De Freitas, M.H. (ed.). Engineering Geology: Principles and Practice. Springer. p. 450. ISBN 978-3-540-29249-4. 978-3-540-29249-4
Price, D.G. (2009). De Freitas, M.H. (ed.). Engineering Geology: Principles and Practice. Springer. p. 450. ISBN 978-3-540-29249-4. 978-3-540-29249-4
ISRM (2007). Ulusay, R.; Hudson, J.A. (eds.). The Blue Book - The Complete ISRM Suggested Methods for Rock Characterization, Testing and Monitoring: 1974-2006. Ankara: ISRM & ISRM Turkish National Group. p. 628. ISBN 978-975-93675-4-1. Archived from the original on 2014-11-05. Retrieved 2011-03-18. 978-975-93675-4-1
"Direct shear test machine". www.cooper.co.uk. Cooper Research Technology. Archived from the original on 27 August 2014. Retrieved 8 September 2014. https://web.archive.org/web/20140827082429/http://cooper.co.uk/shop/soil-testing/direct-shear-test-machine/
"Direct Shear Test; To Determine Shear Strength of Soil. - CivilPie". CivilPie. 2018-05-31. Retrieved 2018-06-06. https://civilpie.com/direct-shear-test
Hencher, S. R.; Richards, L. R. (1989). "Laboratory direct shear testing of rock discontinuities". Ground Engineering. 22 (2): 24–31.