Geodesic
Improved bounds for the recursion width in congruent type methods for solving systems of linear equations
Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part XXII, Tome 367 (2009), pp. 33-44

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The iterative method MINRES-CN is examined as a tool for solving systems of linear equations whose coefficient matrices are low-rank perturbations of symmetric and conjugate-normal matrices. Certain possibilities of improving a priori bounds for the recursion width in this method are indicated. Bibl. – 11 titles. 
@article{ZNSL_2009_367_a3,
     author = {Kh. D. Ikramov},
     title = {Improved bounds for the recursion width in congruent type methods for solving systems of linear equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {33--44},
     publisher = {mathdoc},
     volume = {367},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_367_a3/}
}
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Kh. D. Ikramov. Improved bounds for the recursion width in congruent type methods for solving systems of linear equations. Zapiski Nauchnykh Seminarov POMI, Computational methods and algorithms. Part XXII, Tome 367 (2009), pp. 33-44. http://geodesic.mathdoc.fr/item/ZNSL_2009_367_a3/