Jose C. Ciria Angel de Miguel Eladio Domínguez Angel R. Francés Antonio Quintero Local Characterization of a Maximum Set of Digital (26, 6)-Surfaces. 161-171 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3429&spage=161 2005 conf/dgci/2005 DGCI db/conf/dgci/dgci2005.html#CiriaMDFQ05