Omar Salah and  Ahmed A. Ramadan and  Salvatore Sessa and  Ahmed A. Abo-Ismail,  A Systematic Approach for Design a Low-Cost Mobility Assistive Device for Elderly People.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 597 - 602
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/5437.