Jean-Luc Fouquet Michel Habib Fabien de Montgolfier Jean-Marie Vanherpe Bimodular Decomposition of Bipartite Graphs. 117-128 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3353&spage=117 2004 conf/wg/2004 WG db/conf/wg/wg2004.html#FouquetHMV04