@INPROCEEDINGS {SVF94b,
AUTHOR    = "Sleijpen, G. L. G. and {van der Vorst}, H. A. and Fokkema, D. R.",
TITLE     = "How to improve the convergence of hybrid {Bi-CG} methods",
BOOKTITLE = "{IMACS} '94, Proceedings 14the World Congress on 
             Computation and Applied Mathematics, Late Papers Volume", 
EDITOR    = "Ames W. F.", 
YEAR      =  1994, 
PAGES     = "75--78",}