3D'Appolonia E, Thurman A G. Computed movement of fric- tion and end - bearing piles embedded in uniform and strati- fied soils [ C ]. Proceedings of 6th International Conference on Soil Mechanics and Foundation Engineering, Montereal, 1965, (2).
4Seed H B, Reese L C. The action of soft clay along friction piles [J]. Transactions, ASCE, 1957, 122:731-754.