WULANSARI, P. D.; RAHAYU, N.; FRASISKA, N. The Effect of Incorporating Ginger Extract (Zingiber officinale) to Cow Milk Kefir: An Analysis of Antioxidant and Microbiological and Physicochemical Characteristics . ANIMAL PRODUCTION, v. 22, n. 3, p. 148-153, 12 Jan. 2021.