Alam, S. M. Nazrul; Haas, Zygmunt J., Coverage and Connectivity in Three-dimensional Networks, Proceedings of the 12th Annual International Conference on Mobile Computing and Networking (MobiCom '06), New York, NY, USA: ACM: 346–357, 2006, ISBN 1-59593-286-0, arXiv:cs/0609069, doi:10.1145/1161089.1161128.
Alam, S. M. Nazrul; Haas, Zygmunt J., Coverage and Connectivity in Three-dimensional Networks, Proceedings of the 12th Annual International Conference on Mobile Computing and Networking (MobiCom '06), New York, NY, USA: ACM: 346–357, 2006, ISBN 1-59593-286-0, arXiv:cs/0609069, doi:10.1145/1161089.1161128.