Daya, E. mostafa ., and M. . Potier-Ferry. “A Shell Finite Element for Viscoelastically Damped Sandwich Structures”. European Journal of Computational Mechanics, vol. 11, no. 1, Jan. 2002, pp. 39-56, https://journals.riverpublishers.com/index.php/EJCM/article/view/2669.