1. T.W. Anderson, An Introduction to Multivariate Statistical Analysis, Wiley-Interscience, New York (2003).
2. V. Boginsky, S. Butenko, and P.M. Pardalos, “On structural properties of the market graph,” in: Innovations in Financial and Economic Networks, A. Nagurney (ed.), Edward Elgar Publishing, Northampton (2003), pp. 29–45.
3. V. Boginski, S. Butenko, and P.M. Pardalos, “Statistical analysis of financial networks,” J. Comput. Stat. Data Anal., 48, No. 2, 431–443 (2005).
4. V. Boginski, S. Butenko, and P.M. Pardalos, “Mining market data: a network approach,” J. Comput. Op. Res., 33, No. 11, 3171–3184 (2006).
5. F.K. Gupta, T. Varga, and T. Bodnar, Elliptically Contoured Models in Statistics and Portfolio Theory, Springer, New York (2013).