Sergey Berezin Vijay Ganesh David L. Dill An Online Proof-Producing Decision Procedure for Mixed-Integer Linear Arithmetic. 521-536 2003 conf/tacas/2003 TACAS http://link.springer.de/link/service/series/0558/bibs/2619/26190521.htm db/conf/tacas/tacas2003.html#BerezinGD03