Design of primary and composite routing metrics for RPL-compliant wireless sensor networks - Panagiotis Karkazis; Helen C. Leligou; Sarakis, Lambros; Zahariadis, Theodore; Trakadas, Panagiotis; Velivassaki, Terpsichori H; Capsalis, Christos (2012 international conference on telecommunications and multimedia (TEMU), 2012)