Brinis, Safia, Agma J. M. Traina, and Caetano Traina Jr. “Analyzing Missing Data in Metric Spaces”. Journal of Information and Data Management 5, no. 3 (October 2, 2014): 224. Accessed September 8, 2024. https://journals-sol.sbc.org.br/index.php/jidm/article/view/1538.