Veronica Diaz Quezada,  Limits Problem Solving in Engineering Careers: Competences and Errors.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2019, vol. 151(7). 933 - 939
    [viewed 19 September 2019]. Available from: https://publications.waset.org/pdf/10010543.