Media type: E-Article Title: The exchange condition for association schemes Contributor: Zieschang, Paul-Hermann Published: Springer Science and Business Media LLC, 2006 Published in: Israel Journal of Mathematics, 151 (2006) 1, Seite 357-380 Language: English DOI: 10.1007/bf02777367 ISSN: 0021-2172; 1565-8511 Origination: Footnote: