To cite knor in publications use:

Disa Mhembere, Da Zheng, Carey E. Priebe, Joshua T. Vogelstein, Randal Burns (2017). knor: A NUMA-Optimized In-Memory, Distributed and Semi-External-Memory k-means Library. High-Performance Parallel and Distributed Computing, 26. URL https://arxiv.org/pdf/1606.08905.pdf

Corresponding BibTeX entry:

  @Article{,
    title = {knor: A NUMA-Optimized In-Memory, Distributed and
      Semi-External-Memory k-means Library},
    author = {Disa Mhembere and Da Zheng and Carey E. Priebe and Joshua
      T. Vogelstein and Randal Burns},
    journal = {High-Performance Parallel and Distributed Computing},
    year = {2017},
    volume = {26},
    url = {https://arxiv.org/pdf/1606.08905.pdf},
  }