A. W. Lothongkum*, N. Phaiboonsilpa, K. Seangkiatiyuth, P. Tanprasert, and S. Rojdamrongkarn, “Significant Parameters on the Deviation of Hair Conditioner Viscosity: Part I. Regression Analysis by the Minitab Program”, Curr. Appl. Sci. Technol., vol. 6, no. 2b, pp. 599–606, Mar. 2018.