as seen on zope-announce: "The zNote [1] XML-based Bibliography Management Tool is now in v0.6, which makes it a proper Python-classed product. Also new is full XML import and export, and the ability to choose from multiple bibliographic styles. zNote requires ParsedXML 1.2.1b or better."
Links:
[1] http://www.zope.org/Members/JMaxwell/zNote