Optimal solvers for linear systems with fractional powers of sparse SPD matrices.Published in:Numerical Linear Algebra with Applications, 2018, v. 25, n. 5, p. 1, doi. 10.1002/nla.2167By:Harizanov, S.;Lazarov, R.;Margenov, S.;Marinov, P.;Vutov, Y.Publication type:Article