@MISC{wittek2015somoclu,
  author = {Wittek, Peter, and Gao, Shi Chao and Lim, Ik Soo and Zhao, Li},
  title = {Somoclu: An Efficient Parallel Library for Self-Organizing Maps},
  year = {2015},
  note = {arXiv:1305.1422},
  url = {http://arxiv.org/abs/1305.1422},
}