Ullah, M. I., S. A. Ajwad, M. Irfan, and J. Iqbal. “Non-Linear Control Law for Articulated Serial Manipulators: Simulation Augmented With Hardware Implementation”. Elektronika Ir Elektrotechnika, vol. 22, no. 1, Feb. 2016, pp. 3-7, doi:10.5755/j01.eee.22.1.14094.