Rohmawati, A., N. K. Dwidayanti, and S. Sugiman. “Perbandingan Metode Least Trimmed Square (LTS) Dan Scale (S) Pada Response Surface Methodology”. PRISMA, Prosiding Seminar Nasional Matematika, Vol. 1, Feb. 2018, pp. 728-35, https://journal.unnes.ac.id/sju/prisma/article/view/19685.