To cite Rsomoclu in publications use:

Peter Wittek, Shi Chao Gao, Ik Soo Lim, Li Zhao (2015). Somoclu: An Efficient Parallel Library for Self-Organizing Maps. arXiv:1305.1422. URL http://arxiv.org/abs/1305.1422.

Corresponding BibTeX entry:

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