Widjaja B, Lestari AS, Agusman A. Negative Skin Friction of Piles in Clay Case Study of Textile Factory, Bale Endah. jts [Internet]. 2006Apr.1 [cited 2025Jan.18];2(1):45-59. Available from: http://224305.koshikahk.tech/index.php/jts/article/view/10359