Gimpel H. Preferences in negotiations / H. Gimpel, 2007 r=on-line. - Текст : электронный.
Negotiation, auctions, and market engineering : international seminar, Dagstuhl Castle, Germany, November 12-17, 2006: revised selected papers / ed. H. Gimpel, 2008 r=on-line. - Текст : электронный.