Sang, N.C. and Thang, N.C. 2008. On the design of an optimum active mass-spring-inverted pendulum dynamic vibration absorber for the inverted pendulum type structure. Vietnam Journal of Mechanics. 30, 4 (Dec. 2008), 329 –. DOI:https://doi.org/10.15625/0866-7136/30/4/5638.