Li Liu Bin Hu Huifang Miao Hao Li Lian Li Qinglin Zhao Achieving Energy Conservation, Coverage and Connectivity Requirements in Wireless Sensor Networks. 227-232 2009 ICDCS Workshops http://dx.doi.org/10.1109/ICDCSW.2009.19 conf/icdcsw/2009 db/conf/icdcsw/icdcsw2009.html#LiuHMLLZ09