%0 Journal Article
%T Prolonging the Lifetime of Two-Tiered Wireless Sensor Networks with Mobile Relays
%A Theodore C. Kotsilieris
%A George T. Karetsos
%J ISRN Sensor Networks
%D 2013
%I Hindawi Publishing Corporation
%R 10.1155/2013/610796
%U http://dx.doi.org/10.1155/2013/610796