@techreport{Biedl2001,
 author={Therese Biedl and  Brona Brejova and  Erik D. Demaine and  Angele M. Hamel and  Tomas Vinar},
 title={{Optimal Arrangement of Leaves in the Tree Representing Hierarchical Clustering of Gene Expression Data}},
 number={CS-2001-14},
 institution={University of Waterloo},
 month={April},
 year={2001}
}