Preface
Crossref DOI link: https://doi.org/10.1186/BF03353155
Published Online: 2014-06-25
Published Print: 2009-04
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Text and Data Mining valid from 2009-04-01
Version of Record valid from 2014-06-25
Article History
First Online: 25 June 2014