Jaume Baixeries José L. Balcázar Characterization and Armstrong Relations for Degenerate Multivalued Dependencies Using Formal Concept Analysis. 162-175 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3403&spage=162 2005 conf/icfca/2005 ICFCA db/conf/icfca/icfca2005.html#Balcazar05