@inproceedings{CTT100680789,
  author = {Satoshi Tayu and Dai Itoh and Shuichi Ueno},
  title = {On the Bipartite Dense Subgraph Problem},
  booktitle = {Proceedings of the 2014 IEICE Society Conference},
  year = 2014,
}

@inproceedings{CTT100646538,
  author = {Dai Itoh and Satoshi Tayu and Shuichi Ueno},
  title = {The Complexity of the Densest k-Subgraph Problem for Chordal Bipartite Graphs},
  booktitle = {Proceedings of the 2012 IEICE Society Conference},
  year = 2012,
}