Keith Noto Milton H. Saier Jr. Charles Elkan Learning to Find Relevant Biological Articles without Negative Training Examples. 202-213 2008 Australasian Conference on Artificial Intelligence http://dx.doi.org/10.1007/978-3-540-89378-3_20 conf/ausai/2008 db/conf/ausai/ausai2008.html#NotoSE08