C. Trinh, Zlatanov, D., Zoppi, M., and Molfino, R. M.,
“A Geometrical Approach to the Inverse Kinematics of 6R Serial Robots With Offset Wrists”, in
ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, 2015, pp. V05CT08A016–V05CT08A016.