Luca Becchetti Peter Korteweg Alberto Marchetti-Spaccamela Martin Skutella Leen Stougie Andrea Vitaletti Latency Constrained Aggregation in Sensor Networks. 88-99 2006 conf/esa/2006 ESA http://dx.doi.org/10.1007/11841036_11 db/conf/esa/esa2006.html#BecchettiKMSSV06