1. Niculescu, D., & Nath, B. (2001). Ad hoc positioning system (aps). In IEEE global telecommunications conference (Globecom) (pp. 25–29).
2. Niculescu, D., & Nath, B. (2003). Dv based positioning in ad hoc networks. Telecommunication Systems, 22(1–4), 267–280.
3. Dulman, S., & Havinga, P. (2004). Statistically enhanced localization schemes for randomly deployed wireless sensor networks. In IEEE proceedings of the intelligent sensors, sensor networks and information processing (ISSNIP) (pp. 403–410).
4. Wong, S. Y., Lim, J. G., Rao, S., & Seah, W. K. (2005). Density-aware hop-count localization (dhl) in wireless sensor networks with variable density. In IEEE wireless communications and networking conference (WCNC) (pp. 1848–1853).
5. Yang, S., Yi, J., & Cha, H. (2007). Hcrl: A hop-count-ratio based localization in wireless sensor networks. In IEEE the 4th sensor, mesh and ad hoc communications and networks (SECON) (pp. 31–40).