32. M. Sugimoto1 ,A. M. N. Alagiyawanna, 2003, Pullout Behavior of Geogrid by Test and Numerical Analysis, ASCE Geotechnical and Geoenvironmental Engineering, Vol. 129, No. 4, pp. 361-371.
21. Bakeer R. M., Sayed S. M., Cates P., and Subramanian R., 1998, Pullout and shear tests on geogrid reinforced lightweight aggregate, Jour. of Geotextiles and Geomembranes, Vol. 16, pp. 119-133.