1. Albritton G. E. (1968). “Behaviour of flexible cylinders buried in sand under static and dynamic loading.” Tech. Rep. 1‐821 U.S. Army Engr. Waterways Exp. Sta. Vicksburg Miss. Apr.
2. Allgood J. R. and Ciani J. B. (1968). “The influence of soil modulus on the behaviour of cylinders in sand.” Highway Res. Rec. No. 249 1–13.
3. Amer. Assoc. of State Highway and Transp. Officials. (1983). “Bridge design code.”
4. Anderson R. H. and Boresi A. P. (1962). “Equilibrium and stability of rings under nonuniformly distributed loads.” Proc. 4th Nat. Congr. Appl. Mech. Am. Soc. Mech. Engrs. 1 459–467.
5. Stability of a shallow circular tunnel in cohesionless soil