An, N.T., To, N.D. and Son, N.H. 1996. Longitudinal shock of two elastic bars with the 2nd bar bases on rigid foundation and meets visco-elastic resistance on side face. Vietnam Journal of Mechanics. 18, 4 (Dec. 1996), 6–13. DOI:https://doi.org/10.15625/0866-7136/10106.