حامد محمد أبوبكر و أبوبكر علي يوسف 2018. Studying the Influence of Damping Factor on Transitional Vibrations for Spring Systems Using Simulation Technique . Journal of Pure & Applied Sciences . 17, 1 (Jul. 2018). DOI:https://doi.org/10.51984/jopas.v17i1.69.