“…Beyond more traditional applications to estimation and testing, these measures play an important role in such areas as signal detection, clustering, invariant coordinate selection, as well as in pricing and portfolio analysis. Some related literature, without any presumption of completeness, includes Malkovich and Afifi (1973), Srivastava (1984), Koziol (1989), Móri et al (1994), Oja et al (2006), Balakrishnan et al (2007), Kollo (2008), Tyler et al (2009), Ilmonen et al (2010), Peña et al (2010), Tanaka et al (2010), Huang et al (2014), Lin et al (2015), León and Moreno (2017), Nordhausen et al (2017), Jammalamadaka et al (2020).…”