El Arbi, A.A., Agoujil, S., Hajar, M. and Qaraai, Y. 2016. Optimal Cluster Head in DTN Routing Hierarchical Topology (DRHT). International Journal of Communication Networks and Information Security (IJCNIS). 8, 2 (Aug. 2016). DOI:https://doi.org/10.17762/ijcnis.v8i2.1642.