Antonio Espingardeiro,  Social Assistive Robots, Reframing the Human Robotics Interaction Benchmark of Social Success.   journal   = {International Journal of Mechanical and Materials Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2015, vol. 97(1). 377 - 382
    [viewed 20 October 2021]. Available from: https://publications.waset.org/pdf/10000755.