by EVANS, JOHN A., HUGHES, THOMAS J. R.
Published in Mathematical models & methods in applied sciences (01.07.2013)

by Caucao, Sergio, Oyarzúa, Ricardo, Villa-Fuentes, Segundo
Published in Calcolo (01.12.2020)

Published in Electronic transactions on numerical analysis

Published in Mathematics of computation (2016)

by Tripathy, Madhusmita, Sinha, Rajen Kumar
Published in Numerical functional analysis and optimization (01.03.2012)

by Danisch, Garvin, Starke, Gerhard
Published in SIAM journal on numerical analysis (01.01.2007)

by Ewing, Richard E., Lazarov, Raytcho D., Lu, Peng, Vassilevski, Panayot S.
Published in Preconditioned Conjugate Gradient Methods (05.10.2006)