Qiang Niu and Linzhang Lu, Restarted GMRES Method Augmented with the Combination of Harmonic Ritz Vectors and Error Approximations. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. August 2012, vol. 68(8). 857 - 864 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/5472.