S. Bao, H. Duan, Q. Zhou, M. Xiong, Y. Yu, and Y. Cao. TREC, volume 500-272 of NIST Special Publication, National Institute of Standards and Technology (NIST), (2006)
H. Duan, Q. Zhou, Z. Lu, O. Jin, S. Bao, Y. Cao, and Y. Yu. TREC, volume 500-274 of NIST Special Publication, National Institute of Standards and Technology (NIST), (2007)
J. Ni, K. Zhang, X. Lin, Y. Yu, and X. Shen. SecureComm, volume 198 of Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, page 85-103. Springer, (2016)