M. Anthony and P. L. Bartlett, Neural Network Learning: Theoretical Foundations, 1999.
DOI : 10.1017/CBO9780511624216

S. Boyd and L. Vandenberghe, Convex Optimization, 2004.

M. Ezekiel, Methods of Correlation Analysis, Revista Mexicana de Sociolog??a, vol.23, issue.1, 1930.
DOI : 10.2307/3538352

L. Györfi, M. Kohler, A. Krzy?, and H. Walk, A Distribution-Free Theory of Nonparametric Regression, 2002.
DOI : 10.1007/b97848

R. Koenker, quantreg: Quantile Regression, 2013. R package version 5, p.5