@article{onlinespatialconceptandlexical,
  title = {Online Spatial Concept and Lexical Acquisition with Simultaneous Localization and Mapping},
  author = {Akira Taniguchi and Yoshinobu Hagiwara and Tadahiro Taniguchi and Tetsunari Inamura},
  year = {2017},
  eprint = {1704.04664},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1704.04664v2},
}