@misc {IOPORT.70010554,
    author       = {Wu, Shaoqun and Witten, Ian H.},
    title        = {Content-based language learning in a digital library},
    howpublished = {ICADL, 424-433 (2007).},
    year         = {2007},
    doi          = {10.1007/978-3-540-77094-7_54},
    identifier   = {70010554},
}