@article{10_21136_AM_1982_103989,
     author = {Sloboda, Fridrich},
     title = {An imperfect conjugate gradient algorithm},
     journal = {Applications of Mathematics},
     pages = {426--432},
     publisher = {mathdoc},
     volume = {27},
     number = {6},
     year = {1982},
     doi = {10.21136/AM.1982.103989},
     mrnumber = {0678112},
     zbl = {0503.65017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1982.103989/}
}