Clustered Trees with Minimum Inter-cluster Distance. - Bang Ye Wu; Chen-Wan Lin (CSE, 2014)

A 2-approximation algorithm for the clustered minimum routing cost tree problem. - Chen-Wan Lin; Bang Ye Wu (ICS, 2014)

On the clustered Steiner tree problem. - Bang Ye Wu; Chen-Wan Lin (J. Comb. Optim., 2015)

On the minimum routing cost clustered tree problem. - Chen-Wan Lin; Bang Ye Wu (J. Comb. Optim., 2017)