This package relies on Constrained spectral embedding for K-way data clustering:

Wacquet G, Caillault EP, Hamad D, Hebert P (2013). “Constrained spectral embedding for K-way data clustering.” Pattern Recognition Letters, 34(9), 1009–1017. doi:10.1016/j.patrec.2013.02.003, https://hal.science/hal-01536663.

Wacquet G, Caillault EP, Hebert P (2013). “Semi-supervised K-Way Spectral Clustering with Determination of Number of Clusters.” In Madani, Kurosh, Dourado, Antonio, Rosa, Agostinho, Filipe, Joaquim (eds.), Computational Intelligence: Revised and Selected Papers of the International Joint Conference, IJCCI 2011, Paris, France, October 24-26, 2011, chapter Semi-supervised K-Way Spectral Clustering with Determination of Number of Clusters, 317–332. Springer Berlin Heidelberg, Berlin, Heidelberg. ISBN 978-3-642-35638-4, doi:10.1007/978-3-642-35638-4_21.

Corresponding BibTeX entries:

  @Article{,
    title = {Constrained spectral embedding for K-way data clustering},
    author = {Guillaume Wacquet and Emilie Poisson Caillault and Denis
      Hamad and Pierre-Alexandre Hebert},
    journal = {Pattern Recognition Letters},
    year = {2013},
    volume = {34},
    number = {9},
    pages = {1009--1017},
    url = {https://hal.science/hal-01536663},
    pdf = {https://hal.science/hal-01536663/file/2013.PRL.pdf},
    doi = {10.1016/j.patrec.2013.02.003},
  }

  @InBook{,
    title = {Semi-supervised K-Way Spectral Clustering with
      Determination of Number of Clusters},
    author = {Guillaume Wacquet and Emilie Poisson Caillault and
      Pierre-Alexandre Hebert},
    editor = {{Madani} and {Kurosh} and {Dourado} and {Antonio} and
      {Rosa} and {Agostinho} and {Filipe} and {Joaquim}},
    booktitle = {Computational Intelligence: Revised and Selected
      Papers of the International Joint Conference, IJCCI 2011, Paris,
      France, October 24-26, 2011},
    chapter = {Semi-supervised K-Way Spectral Clustering with
      Determination of Number of Clusters},
    year = {2013},
    publisher = {Springer Berlin Heidelberg},
    address = {Berlin, Heidelberg},
    pages = {317--332},
    isbn = {978-3-642-35638-4},
    doi = {10.1007/978-3-642-35638-4_21},
  }