9N. G Cortlever. Design of Double Track Railway on AuGeo Piling System [ C ], Symposium on Cround Improvement and Geosynthetic Applications. Bangkok: [s.n. ], 2001.
10N. G Cortlever. Settlement flee embankments with AuC, eo - piling system [C] . The 4th International Conference on Ground Improvement Techniques, Malaysia: [ s. n. ], 2002.