Minghui Wang,  An Iterative Method for the Least-squares Symmetric Solution of AXB+CYD=F and its Application.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2010, vol. 37(1). 134 - 137
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/7989.