4Robertson P K and Capmenella R G .Interpretation of cone penetration tests Part I and Part II. Canadian Geotechnical Jurnal,1983,20(4).
5Lunne T, Robertson P K and POWELL J J M.Cone Penetration Testing in Geotechnical Practice. Blakie Academic & Professional,1977.
6Schmertmann J M .Guideline for Cone Penetration Test Performance and Design. Report 1978 FHWA-TS-78-209.
7Fellenius B H and Eslami A.Soil Profile Interpreted from CPTu Data. ""Year 2000 Geotechnics"" Geotechnical Engineering Conference, Asian Institute of Technology, Bangkok, Thailand.
8Meigh A C, et al. (1987) Cone Penetration Test (Methods and Interpretation).
9Manual ROSON 25-40kN +WINCH 06-2007, A. E Vandenberg, 2007.