ESSA, Mohamad Jawad K. Exact Stiffness Matrices for Piles in Nonhomogeneous Elastic Foundation. Basrah Journal for Engineering Sciences, [S. l.], v. 6, n. 1, p. 62–73, 2006. DOI: 10.33971/bjes.6.1.6. Disponível em: https://bjes.journalpath.com/bjes/article/view/26. Acesso em: 6 may. 2026.