Rabhi, A., N. Kadiri, and S. D. . Mekki. “Asymptotic Properties of the Semi-Parametric Estimators of the Conditional Density for Functional Data in the Single Index Model With Missing Data at Random”. Statistica, vol. 81, no. 4, Jan. 2021, pp. 399-22, doi:10.6092/issn.1973-2201/10472.