@article{CTT100639338,
  author = {Akio Hada and Kenichi Soga and Ruoshui Liu and Ian Wassell},
  title = {Lagrangian heuristic method for the wireless sensor network design problem in railway structural health monitoring},
  journal = {Mechanical Systems and Signal Processing},
  year = 2012,
}

@inproceedings{CTT100639527,
  author = {Sugiyama, M. and Kanamori, T. and Suzuki, T. and du Plessis, M. C. and Liu, S. and Takeuchi, I.},
  title = {Density difference estimation.},
  booktitle = {IEICE Technical Report, IBISML2012-8},
  year = 2012,
}