TY - RPRT T1 - An Algorithm which Approaches the Exact Solution for the Problem of Constructing a Hierarchical Graph that Satisfies the Sufficient Condition for Optimality A1 - Fernández-Madrigal, Juan-Antonio Y1 - 1998 T2 - Computer Science Dpt. - University of Texas at Austin (USA) / System Engineering and Automation Dpt. - University of Málaga (Spain) ER -