@article{10_1007_s10492_005_0017_z,
     author = {Kar\'atson, J\'anos},
     title = {Mesh independent superlinear convergence estimates of the conjugate gradient method for some equivalent self-adjoint operators},
     journal = {Applications of Mathematics},
     pages = {277--290},
     publisher = {mathdoc},
     volume = {50},
     number = {3},
     year = {2005},
     doi = {10.1007/s10492-005-0017-z},
     mrnumber = {2133730},
     zbl = {1099.65033},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-005-0017-z/}
}