@INPROCEEDINGS {SFV94,
AUTHOR    = "Sleijpen, G. L. G. and Fokkema, D. R. and {van der Vorst}, H. A.",  
TITLE     = "{BiCGstab($\ell$)}: an Efficient and Surprisingly 
             Stable Solver of Nonsymmetric Linear Equations",
BOOKTITLE = "Proceedings of the Cornelius Lanczos International
             Centenary Conference", 
EDITOR    = "Brown, J. D. and Chu, M. T. and Ellison, D. C. 
             and Plemmons, R. J.", 
SERIES    = "Proceedings in Applied Mathematics",
VOLUME    = "73",
PUBLISHER = "{SIAM}", 
ADDRESS   = "Philadelphia", 
YEAR      =  1994, 
PAGES     = "291--293",}
%% IBSN 0-89871-339-0,