WASET
    Yiqin Lin and  Liang Bao and  Yimin Wei,  A Projection Method Based on Extended Krylov Subspaces for Solving Sylvester Equations.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 1064 - 1070
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/15709.