1. Wang, B., Yang, X., Wang, G., et al.: Energy efficient approximate self adaptive data collection in wireless sensor networks. Front. Comput. Sci. 10(5), 936–950 (2016)
2. Sun, Y., Chen, M., Hu, L., et al.: ASA: against statistical attacks for privacy-aware users in location based service. Future Gen. Comput. Syst. 70(4), 48–58 (2017)
3. Zhang, X.J., Gui, X.L., Wu, Z.D.: Privacy preservation for location-based services: a survey. J. Softw. 26(9), 2373–2395 (2015)
4. Mingjie, M.A., Yuejin, D.U., Fenghua, L.I., Jiawen, L.: Review of semantic-based privacy-preserving approaches in LBS. Chin. J. Netw. Inf. Secur. 2(12), 1–11 (2016)
5. Wang, Y., Xia, Y., Hou, J., et al.: A fast privacy-preserving framework for continuous location-based queries in road networks. J. Netw. Comput. Appl. 53(1), 57–73 (2015)