1. AASHTO. (2007). "Section 10: Foundations" LRFD Bridge Design Specifications American Assoc. of State Highway and Transportation Officials Washington D.C.
2. Briaud J. L. and Gibbens R. (1997). Large scale load tests and database of spread footings on sand USDoT Federal Highway Association Publication No. FHWA-RD-97-068 Washington DC 228p.
3. Brinch Hansen J. (1970). "A Revised and Extend Formula for Bearing Capacity" Akademiet for de Tekniske Videnskaber Geoteknisk Institut Bullentin No.28 Copenhagen: 5-11
4. De Beer E. E. and Ladanyi B. (1961). "Etude expérimentale de la capacité protante du sable sous des fondations circulaires établies en surface" Proc. 5th Int. Conference on Soil Mechanics and Foundation Engrg Vol. 1 Paris: 577-581