@conference {522, title = {A System for the Simplification of Numerical Expressions at Different Levels of Understandability.}, booktitle = {Workshop on Predicting and Improving Text Readability for Target Reader Populations -ACL 2013}, year = {2013}, month = {08/2013}, address = {Sofia, Bulgaria}, attachments = {http://nil.fdi.ucm.es/sites/default/files/Poster_SusanaBautista_PITR2013.pdf}, author = {Bautista, Susana and Herv{\'a}s, Raquel and Pablo Gerv{\'a}s and Richard Power and Sandra Williams} }