R. Pahlepi, I. Sriliana, W. Agwil, and C. R. Oktarina, “BIRESPONSE SPLINE TRUNCATED NONPARAMETRIC REGRESSION MODELING FOR LONGITUDINAL DATA ON MONTHLY STOCK PRICES OF THREE PRIVATE BANKS IN INDONESIA”, BAREKENG: J. Math. & App., vol. 19, no. 4, pp. 2467-2480, Sep. 2025.