Yanjun Sun Omer Gurewitz Shu Du Lei Tang David B. Johnson ADB: an efficient multihop broadcast protocol based on asynchronous duty-cycling in wireless sensor networks. 43-56 2009 SenSys http://doi.acm.org/10.1145/1644038.1644044 conf/sensys/2009 db/conf/sensys/sensys2009.html#SunGDTJ09