Carlo A. Furia Paola Spoletini Tomorrow and All our Yesterdays: MTL Satisfiability over the Integers. 126-140 2008 ICTAC http://dx.doi.org/10.1007/978-3-540-85762-4_9 conf/ictac/2008 db/conf/ictac/ictac2008.html#FuriaS08