Berendsohn, W. G.: A taxonomic information model for botanical databases: the IOPI Model. Taxon 46: 283-309. 1997.
© 1997 by IAPT (Europe), on behalf of the International Association for Plant Taxonomy.
Reprinted by kind permission of the Editor of Taxon (T. F. Stuessy).
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Further publications by W. Berendsohn: http://www.bgbm.org/berendsohn/publikat.htm.