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m WP:CHECKWIKI error fix for #61. Punctuation goes before References. Do general fixes if a problem exists. - using AWB (8853) |
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<ref name="HA99">W. Hackbusch,
''A sparse matrix arithmetic based on H-matrices. Part I: Introduction to H-matrices'',
Computing (1999), 62:89–108</ref><ref name="MB08">M. Bebendorf,
''Hierarchical matrices: A means to efficiently solve elliptic boundary value problems'',
Springer (2008)</ref>
<ref name="HA09">W. Hackbusch,
''Hierarchische Matrizen. Algorithmen und Analysis'',
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