J.S.Mahajan, and L. S. Dhamande. “Review: DESIGN OF PASSIVE COMPOSITE ISOLATION SYSTEM FOR MACHINE FOUNDAION”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 4, no. 5, May 2017, pp. 1111-4, https://ijaerd.org/index.php/IJAERD/article/view/2430.