1. An introduction to kernel and nearest-neighbor nonparametric regression;Altman;Am. Stat.,1992
2. A new method for non-parametric multivariate analysis of variance;Anderson;Austral Ecol.,2001
3. Rome in the East: The Transformation of an Empire;Ball,2000
4. Bates, D. Maechler, M., 2019. Matrix: Sparse and Dense Matrix Classes and Methods. R package version 1.2-18. https://CRAN.R-project.org/package=Matrix.
5. Materials for the Study of Variation, Treated with Special Regard to Discontinuity in the Origin is Species;Bateson,1894