Tran, Thom Thi, et al. “Free Vibration of Agglomerated Carbon Nanotube Reinforced Composite Sandwich Beam Using an Enriched Finite Beam Element ”. <i>Vietnam Journal of Science and Technology</i>, vol. 63, no. 4, Aug. 2025, pp. 806-19, doi:10.15625/2525-2518/17640.