By He Kaizhang   Porter Kenneth W.   Hasan Ahmad   Briley and J. David   Shaw Barbara Ramsay   in Nucleic Acids Research

ISSN:1362-4962|27|8|1788-1794

Oxford University Press‎(1999)‎

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By He* Kai   Zhang Xi-cheng   in Acta Mathematicae Applicatae Sinica

ISSN:0168-9673|23|3|501-512

Springer Publishing Company ‎(2007)‎

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