A. Ayuningtias, S. Nurhasanah, B. Nurhadi, and E. Subroto, “Textural Characteristic of Margarine Enriched with Pectin Fiber by Using Blending Method”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 3, no. 4, pp. 268–272, Aug. 2013.