Kozubal, J., W. Puła, M. Wyjadłowski, and J. Bauer. “Influence of Varying Soil Properties on Evaluation of Pile Reliability under Lateral Loads”. Journal of Civil Engineering and Management, vol. 19, no. 2, Apr. 2013, pp. 272-84, doi:10.3846/13923730.2012.756426.