Ashish R. Pawar, Dhanashree S. Ware, Sampada S. Ahirrao, K. H. M. G. E. K. “Analysis of Damping of Sandwich Materials by Using Free Vibrations”. Mathematical Statistician and Engineering Applications, vol. 70, no. 1, Jan. 2021, pp. 796-0, doi:10.17762/msea.v70i1.2701.