Gómez, S. , Sánchez, G. , Zarama, J. , Ramos, M. , Alcántar, J. , Torres, J. , Núñez, A. , Santana, S. , Nájera, F. , Lopez, J.. "Design of a 4-DOF Robot Manipulator with Optimized Algorithm for Inverse Kinematics". World Academy of Science, Engineering and Technology, Open Science Index 102, International Journal of Mechanical and Mechatronics Engineering, (2015), 9(6), 929 - 934.