WASET
    Marwan Abukhaled and  Ibrahim Sadek,  Optimal Control of Piezo-Thermo-Elastic Beams.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2011, vol. 51(3). 452 - 454
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/9408.