Hung, D.T., Khang, N.V., Sanh, D., Tho, B.X. and Tho, H.D. 1982. Some dynamical calculations of a transducer of two constact points type with two degrees of freedom. Vietnam Journal of Mechanics. 4, 4 (Dec. 1982), 19–26. DOI:https://doi.org/10.15625/0866-7136/10471.