How many principal components? stopping rules for determining the number of non-trivial axes revisited. - Pedro R. Peres-Neto; Donald A. Jackson; Keith M. Somers (Comput. Stat. Data Anal., 2005)

Exploratory analysis of multivariate data: Applications of parallel coordinates in ecology. - Omar Alminagorta; Charlie J. G. Loewen; Derrick T. de Kerckhove; Donald A. Jackson; Cindy Chu (Ecol. Informatics, 2021)