Anna Islamiyati และผู้แต่งคนอื่นๆ. (2020) Penalized spline estimator with multi smoothing parametersin bi-response multi-predictor nonparametric regression modelfor longitudinal data. <i>Songklanakarin Journal of Science and Technology</i>, <i>42</i>(4), 897-909.Anna Islamiyati และผู้แต่งคนอื่นๆ. "Penalized spline estimator with multi smoothing parametersin bi-response multi-predictor nonparametric regression modelfor longitudinal data". Songklanakarin Journal of Science and Technology 42 (2020):897-909.Anna Islamiyati และผู้แต่งคนอื่นๆ. Penalized spline estimator with multi smoothing parametersin bi-response multi-predictor nonparametric regression modelfor longitudinal data. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2020.