By Popp Magnus   Erixon Per   Eggens Frida   Oxelman Bengt   in Systematic Botany

ISSN:1548-2324|30|2|302-313

American Society of Plant Taxonomists‎(2005)‎

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By Svennblad Bodil   Erixon Per   Oxelman Bengt   Britton Tom   in Systematic Biology

ISSN:1063-5157|55|1|116-121

Oxford University Press‎(2006)‎

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