Artur Matuck and  Guilherme F. Nobre,  Communicative and Artistic Machines: A Survey of Models and Experiments on Artificial Agents.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 118(10). 1816 - 1820
    [viewed 22 September 2019]. Available from: https://publications.waset.org/pdf/10005576.