René Santaolaya Salgado Liliana Badillo-Sánchez Olivia Graciela Fragoso Diaz Process for Contract Extraction. 37-42 2008 ICSEA http://dx.doi.org/10.1109/ICSEA.2008.64 conf/icsea/2008 db/conf/icsea/icsea2008.html#SalgadoBD08