Radiocolorings in Periodic Planar Graphs: SPACE - Completeness and Efficient Approximations for the Optimal Range of Frequencies CTI Technical Report No. TR2002/10/04 - Φωτάκης, Δημήτρης; Νικολετσέας, Σωτήρης; Παπαδοπουλου, Βικυ; Σπυράκης, Παύλος Γ.; FOTAKIS, DIMITRIS; NIKOLETSEAS, SOTIRIS; PAPADOPOULOU, VICKY; Σπυράκης, Παύλος Γ. (CTI, 2002)