Nitin Kumar Jain,  Analysis of Stress Concentration and Deflectionin Isotropic and Orthotropic Rectangular Plates with Central Circular Hole under Transverse Static Loading.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2009, vol. 36(12). 1513 - 1519
    [viewed 23 February 2020]. Available from: https://publications.waset.org/pdf/250.