Difference Algebra - Alexander, Levin; Friedlander, Eric; Greenlees, J.P.C.; Greenlees, John; Hiss, G.; Levin, Director of Financial Engineering Alexander; Moerdijk, Ieke; Reiten, Idun; Schweigert, Christoph; Teicher, Mina; Verschoren, A. (Springer Netherlands, 2008)