1. Bernstein N., The Coordination and Regulation of Movements, Pergamon Press, 1967.
2. Mizen N.J., Design and Test of a Full-Scale, Wearable, Exoskeletal Structure, Tech. Rep. Cornell Aeron. Lab., 1964.
3. Todd D.J., Walking Machines, Kogan Page, London, 1985.
4. Vukobratović M., Juricić D., “Contribution to the Synthesis of Biped Gait”, IEEE Trans, on Bio-Medical Engineering, Vol. 16, No. 1, 1969.
5. Hristić D., Vukobratović M., “A New Approach to Rehabilitation of Severely Handicaped Persons” Automatika, No. 1, Zagreb, 1971.