1. Anderson T. Vvedenie v mnogomernyj statisticheskij analiz. [Introduction to multivariate statistical analysis]. Moscow, State Publishing House of Physical and Mathematical Literature Publ., 1963. 500 p.
2. Durand B., Odell P. Klasternyj analiz. [Cluster analysis]. Moscow, Statistika Publ., 1977. 128 p.
3. Dr. Tirthajyoti Sarkar. Clustering and dimensionality reduction techniques combined.
4. Available at: https: //github.com/tirthajyoti/Machine- Learning-with-Python/blob/master/Clustering-Dimensio¬nality-Reduction/Clustering_with_dim_reduction.ipynb (accessed 07.07.2023).
5. Ajvazyan S.A., Buhshtaber V.M., Enyukov I.S. Prikladnaya statistika. Klassifikaciya i snizhenie razmernosti [Applied statistics. Classification and dimension reduction]. Moscow: Finansy i statistika Publ., 1989. 607 p. ISBN 5-279-00054-X.