Suleev Б., Togizbaeva Б., Balabekova К., and Kenesbek А. “Mathematical Modeling of the Additional Working Body of the Excavator”. Eurasian Journal of Applied Engineering and Technology (EJAET), vol. 136, no. 3, Sept. 2021, pp. 74-83, doi:10.32523/2616-7263-2021-136-3-74-83.