The following reference works were consulted when creating this example problem:
Eurocode 7: Geotechnical Design - Part 1: General Rules, 2014. DIN EN 1997-1:2014-3 (E).
Lazebnik, G. E. & Tsinker, G. P. (1998). Lateral earth pressure at rest. 165-183. Monitoring of Soil-Structure Interaction: Instruments for Measuring Soil Pressures. New York: Springer.