@article{NUMA_1975__24_132330,
     author = {G.W. Stewart},
     title = {The {Convergence} of the {Method} of {Conjugate} {Gradients} at {Isolated} {Extreme} {Points} of the {Spectrum.}},
     journal = {Numerische Mathematik},
     pages = {85--94},
     publisher = {mathdoc},
     volume = {24},
     year = {1975},
     zbl = {0295.65026},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1975__24_132330/}
}