@article{CTT100659908,
  author = {Yuichiro Miyamoto and Tomomi Matsui},
  title = {Perfectness and imperfectness of unit disk graphs on triangular lattice points},
  journal = {Discrete Mathematics},
  year = 2009,
}

@article{CTT100659909,
  author = {Yusuke Kuroki and Tomomi Matsui},
  title = {An Approximation Algorithm for Multidimensional Assignment Problems Minimizing the Sum of Squared Errors},
  journal = {Discrete Applied Mathematics},
  year = 2009,
}

@article{CTT100659910,
  author = {Masaru Iwasa and Hiroo Saito and Tomomi Matsui},
  title = {Approximation Algorithms for the Single Allocation Problem in Hub-and-Spoke Networks and Related Metric Labeling Problems},
  journal = {Discrete Applied Mathematics},
  year = 2009,
}

@article{CTT100659911,
  author = {Hiroo Saito and Tetsuya Fujie and Tomomi Matsui and Shiro Matuura},
  title = {A study of the quadratic semi-assignment polytope},
  journal = {Discrete Optimization},
  year = 2009,
}

@article{CTT100659912,
  author = {Hirotatsu Kobayashi and Tomomi Matsui},
  title = {Successful Manipulation in Stable Marriage Model with Complete Preference Lists},
  journal = {IEICE TRANSACTIONS on Information and Systems},
  year = 2009,
}

@inproceedings{CTT100664485,
  author = {Daisuke Yamaguchi and Shinji Imahori and Ryuhei Miyashiro and Tomomi Matsui},
  title = {An Improved Approximation Algorithm for the Traveling Tournament Problem},
  booktitle = {Algorithms and Computation  Lecture Notes in Computer Science},
  year = 2009,
}