@InProceedings{HenrikssonVelupillaiNeSp2010,
author    = {Henriksson, Aron and  Velupillai, Sumithra},
title     = {Levels of Certainty in Knowledge-Intensive Corpora:
An Initial Annotation Study},
booktitle = {Proceedings of the Workshop on Negation and Speculation in Natural Language Processing},
month     = {July 10},
year      = {2010},
address   = {Uppsala, Sweden},
publisher = {University of Antwerp},
pages     = {41--45},
isbn     = {9789057282669},
url       = {http://people.dsv.su.se/~sumithra/publications/NeSp2010/NeSp-NLP-2010-Article_v4.pdf}
}