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Advances in GeometryVol. 3, No. 4, pp. 423–432 (2003)  | 
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The classification of SPG-systems of index 2S. De WinterFull text of the article: (for faster download, first choose a mirror) 
 Electronic fulltext finalized on: 8 Sep 2003. This page was last modified: 20 Jun 2005. 
© 2003 Walter de Gruyter GmbH & Co. KG
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