J. Radojicic and  D. Surdilovic and  G. Schreck,  Modular Hybrid Robots for Safe Human-Robot Interaction.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2009, vol. 36(12). 1601 - 1607
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/11517.