Edmundas Kazimieras Zavadskas Arturas Kaklauskas Zenonas Turskis Jolanta Tamosaitiene Multi-Attribute Decision-Making Model by Applying Grey Numbers. 305-320 2009 20 Informatica, Lith. Acad. Sci. 2 http://iospress.metapress.com/content/22512m91v2887627/ db/journals/informaticaLT/informaticaLT20.html#ZavadskasKTT09