Deying Li 0001 Zheng Li Lin Liu 0001 Energy Efficient Broadcast Routing in Ad Hoc Sensor Networks with Directional Antennas. 29-39 2008 WASA https://doi.org/10.1007/978-3-540-88582-5_6 conf/wasa/2008 db/conf/wasa/wasa2008.html#LiLL08