Benham, Peter P.; Warnock, Frederick V. (1976). Mechanics of solids and structures: SI Units (Rev. and repr ed.). London: Pitman. ISBN 978-0-273-36191-6. 978-0-273-36191-6
Das, Braja M., ed. (2011). Geotechnical engineering handbook. Ft. Lauderdale, FL: J. Ross Pub. ISBN 978-1-932159-83-7. 978-1-932159-83-7
Benham, Peter P.; Warnock, Frederick V. (1976). Mechanics of solids and structures: SI Units (Rev. and repr ed.). London: Pitman. ISBN 978-0-273-36191-6. 978-0-273-36191-6