Kumar S, Sreedhar, Madheswaran M, Vinutha B A, Manjunatha Singh H, and Charan K V. “A Brief Survey of Unsupervised Agglomerative Hierarchical Clustering Schemes”. International Journal of Engineering and Technology 8, no. 1 (January 27, 2019): 29–37. Accessed February 25, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/13971.