TY - BOOK AU - Axelsson,O & Kolotilina,L.Yu (eds) ED - Kolotilina, L.Yu TI - Preconditioned conjugate gradient methods: proceedings of conference held at the faculty of maths. & informatics, university of nijmegen, netherlands, june 19-21, 1989 T2 - Lecture notes in mathematics 1457 SN - 3540535152 U1 - 11.14 PY - 1990/// CY - Berlin PB - Springer ER -