Drago C., Scepi G. (2011), “Visualizing and Exploring High Frequency Financial Data: Beanplot Time Series” in “New Perspectives in Statistical Modeling and Data Analysis”, S. Ingrassia, R.Ricci, M. Vichi editors, pag. 283 – 290, Springer – Verlag Berlin Heidelberg, 2011 (also presented at 7°Meeting of the Classification and Data Analysis Group of the Italian Statistical Society, Catania Settembre 2009