\begin{thebibliography}{THS98}

\bibitem[CH88]{plas:chen}
W.F. Chen and D.J. Han.
\newblock {\em Plasticity for Structural engineers}.
\newblock Springer-Verlag, 1988.

\bibitem[Geb97]{msthesis:megan}
Megan~Alissa Gebhardt.
\newblock Shear strength of shredded tires as applied to the design and
  construction of a shredded tire stream crossing.
\newblock Master's thesis, Iowa State University, Ames, Iowa, 1997.

\bibitem[HD98]{deform:drescher}
T.~C. Heimdahl and A.~Drescher.
\newblock Deformability parameters of lightweight fills.
\newblock In {\em 9th Conference of Cold Region Engineering}, pages 524--535,
  Duluth, Minn., 1998. ASCE.

\bibitem[HD99]{ani:drescher}
Thor~C. Heimdhal and Andrew Drescher.
\newblock Elastic anisotropy of tire shreds.
\newblock {\em Journal of Geotechnical and Geoenvironmental Engineering}, pages
  383--389, May 1999.

\bibitem[HE95]{insul:humphrey}
D.N. Humphrey and R.A. Eaton.
\newblock Field performance of tire chips as subgrade insulation for rural
  roads.
\newblock In {\em Proc., 14th International conference on Low-Volume Roads},
  volume~2, pages 77--86. TRB, National Research Council, Washington, D.C.,
  1995.

\bibitem[HM92]{grout:humphrey}
D.~N. Humphrey and W.~P. Manion.
\newblock Properties of tire chips for lightweight fill.
\newblock In R.~H.~Borden et~al, editor, {\em Proc., Conf. on Gouting, soil
  improvement and geosynthetics}, volume~2, pages 1344--1355, ASCE, New York,
  1992.

\bibitem[HN97]{pavement:humphrey}
D.N. Humphrey and Jr.~W.L. Nickels.
\newblock Effect of tire chips as lightweight fill on pavement performance.
\newblock In {\em Proc., 14th International Conference on Soil Mechanics and
  Foundation Engineering}, volume~3, pages 1617--1620, 1997.

\bibitem[JS97]{Jeremic96b}
Boris Jeremi{\' c} and Stein Sture.
\newblock Implicit integrations in elasto--plastic geotechnics.
\newblock {\em International Journal of Mechanics of Cohesive--Frictional
  Materials}, 2:165--183, 1997.

\bibitem[THS98]{active:humphrey}
J.J. Tweedie, D.N. Humphrey, and T.C. Sanford.
\newblock Tire shreds as lightweight retaining wall backfill: Active condition.
\newblock {\em Journal of Geotechnical and Geoenvironmental Engineering}, pages
  1061--1070, November 1998.

\end{thebibliography}
