Azita Tajaddini and  Ramleh Shamsi,  The BGMRES Method for Generalized Sylvester Matrix Equation AXB − X = C and Preconditioning.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2016, vol. 117(9). 467 - 474
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10007444.