LECTURE NOTES IN COMPUTER SCIENCE, vol. 4993, page. 626 - 631, 2008-01
LECTURE NOTES IN COMPUTER SCIENCE, vol. 4993, page. 22 - 23, 2008-01
LECTURE NOTES IN COMPUTER SCIENCE, vol. 4956, page. 382 - 393, 2008-01
LECTURE NOTES IN COMPUTER SCIENCE, vol. 4956, page. 684 - 688, 2008-01
LECTURE NOTES IN COMPUTER SCIENCE, vol. 4956, page. 674 - 678, 2008-01
LECTURE NOTES IN COMPUTER SCIENCE, vol. 4956, page. 658 - 662, 2008-01
INFORMATION RETRIEVAL, vol. 15, no. 2, page. 157 - 177, 2012-04