Khazaei, Javad, and Abolfazl Eslami. 2016. “Geotechnical Behavior of Helical Piles Via Physical Modeling by Frustum Confining Vessel (FCV)”. International Journal of Geography and Geology 5 (9):167-81. https://doi.org/10.18488/journal.10/2016.5.9/10.9.167.181.