@article{DBLP:journals/jbi/ChenGPG12,
author = {Yan Chen and
Huanying Gu and
Yehoshua Perl and
James Geller},
title = {Overcoming an obstacle in expanding a UMLS semantic type
extent},
journal = {Journal of Biomedical Informatics},
volume = {45},
number = {1},
year = {2012},
pages = {61-70},
ee = {http://dx.doi.org/10.1016/j.jbi.2011.08.021},
bibsource = {DBLP, http://dblp.uni-trier.de}
}