@INPROCEEDINGS{07xw-gc,
     AUTHOR = {Yi Xu and Wenye Wang},
     TITLE = {{Stability of Hierarchical Mobile Ad Hoc Networks}},
     BOOKTITLE = {{Proc. of IEEE GLOBECOM'07)}},
     VOLUME = {},
     PAGES = {1232-1236},
     MONTH = {November},
     YEAR = {2007}}
     OPTNOTE = network architecture, network lifetime, hierarchical routing