M. Sadighi and  H. Pouriayevali and  M. Saadati,  A Study of Indentation Energy in Three Points Bending of Sandwich beams with Composite Laminated Faces and Foam Core.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2007, vol. 12(12). 121 - 127
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/6053.