Kumar, N., Agrawal, R. K., & Jaiswal, A. (2016). Incremental and Decremental Nonparametric Discriminant Analysis for Face Recognition. Computing and Informatics, 35(5), 1231–1248. https://cai.type.sk/content/2016/5/incremental-and-decremental-nonparametric-discriminant-analysis-for-face-recognition/