1. Amoroso, L.: Ricerche intorno alla curva dei redditi. Annali di Matematica Pura ed Applicata 2, 123–159 (1925)
2. Azzalini, A.: Further results on a class of distributions which includes the normal ones. Statistica XLVI(2), 199–208 (1986)
3. Azzalini, A.: The R package sn: The Skew-Normal and Skew-t distributions (version 1.3-0). (2015).
http://azzalini.stat.unipd.it/SN
4. Azzalini, A., With the collaboration of Capitanio, A.: The Skew-Normal and Related Families. IMS monographs. Cambridge University Press, Cambridge (2014)
5. Bowman, A.W., Azzalini, A.: Applied smoothing techniques for data analysis: the kernel approach with S-Plus illustrations. Oxford University Press, Oxford (1997)