IPI: Flexible and Efficient Index Structure for Object Deputy Database
LI Yujun, PENG Zhiyong, WU Xia, LAN Hai, PENG Yuwei
Journal of Frontiers of Computer Science and Technology . 2018, (8): 1191 -1201 .  DOI: 10.3778/j.issn.1673-9418.1709042