@article{GDZPPN001180193,
title = {On a Class of Chebyshev Approximation Problems Which Arise in Connection with a Conjugate Gradient Type Method.},
journal = {Numerische Mathematik},
volume = {50},
year = {1986},
pages = {525-542},
zbl = {0611.65016},
url = {http://dml.mathdoc.fr/item/GDZPPN001180193}
}
Ruscheweyh, Stephan; Freund, Roland. On a Class of Chebyshev Approximation Problems Which Arise in Connection with a Conjugate Gradient Type Method.. Numerische Mathematik, Tome 50 (1986) pp. 525-542. http://gdmltest.u-ga.fr/item/GDZPPN001180193/